OCCUPATION AND HEALTH

01 January 2021, Volume 37 Issue 1

Investigation on status of noise hazard in industrial enterprises in Fuling District of Chongqing

LUO Yan, YIN Qi, WANG Cun-jian, WANG Ling

2021, 37(1): 1-4. DOI: 10.13329/j.cnki.zyyjk.2021.0001

Abstract ( 4392 )

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Objective To investigate the present situation of noise hazard in industrial enterprises in Fuling District of Chongqing，analyze the hazard characteristics，and provide scientific basis for the prevention and control of occupational noise hazards in Fuling District. Methods Declaration data about the employers with occupational noise hazard up to the December 31，2019 were exported from the "occupational-disease-inductive project declaration system"， and the case cards of on-the-job occupational health examination in 2019 were exported from the "occupational-disease-inductive and occupational health information monitoring system". Relevant information was extracted and epidemiological characteristics were analyzed. Results A total of 268 enterprises with noise hazard were located in Fuling District， involving 11 494 people. The enterprises with noise hazard were mainly in the manufacturing industries（61.57%） of small（58.58%） and private economy（66.42%）. The workers exposed to noise were mostly found in the manufacturing industries（86.61%） of medium-sized（50.51%） and private economy（60.74%）. 201 enterprises conducted the occupational hazard tests in noise workplaces in 2019 and the over standard rate was 10.63%. The enterprises with a higher over standard rate were mainly in the small and medium-sized （11.95%， 11.46%） manufacturing industries （14.48%） of collective economy（50.00%）， and the differences were statistically significant（all P<0.05）. 8 276 people received the on-the-job occupational health examination for noise operation in 2019 and the abnormal rate of binaural average high frequency hearing threshold was 10.66%. People with higher abnormal rate were mainly male（12.87%） who were aged ≥40 years old（15.08%），exposure working age ≥30 years（18.07%） in private economy（13.66%）， mining industry（20.00%） and construction industry（20.59%），and the differences were statistically significant（all P<0.05）. Conclusion In Fuling District of Chongqing， the future occupational health work should focus on the noise occupational hazards of small and medium-sized private economy manufacturing industry，and strengthen the noise monitoring of mining industry and construction industry.

Study on difference of chest CT and DR chest radiography in pneumoconiosis

WANG Cheng-xia, WANG Ning-ning, QIU Lu, CAI Zhi-chun, CUI Ping, WANG Huan-qiang

2021, 37(1): 5-10. DOI: 10.13329/j.cnki.zyyjk.20201028.001

Abstract ( 2198 )

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Objective To analyze the characteristics of chest computed tomography（CT） images of pneumoconiosis and the differences between CT and digital radiography（DR） chest radiographs，explore the imaging method and value of CT in the diagnosis and staging of pneumoconiosis. Methods Totally 113 patients with pneumoconiosis， who were diagnosed in the Zibo Occupational Disease Prevention and Control Hospital from November 22， 2018 to June 26， 2019， were given DR chest radiographs and high-resolution CT scans， and CT scan used 2 and 5 mm layer thickness to image respectively. The differences in imaging manifestations of small shadows， large shadows， emphysema， lymphnodes， and pleural thickening of pneumoconiosis between DR chest radiograph and CT images were compared and analyzed. Results The small shadow of pneumoconiosis DR chest film showed nodular and diffuse fibrosis changing on CT images. Nodular changes were found in 107 cases（94.69%）， showing circular and solid nodules. There were statistically significant differences between CT and DR in showing the shape and size of small shadow， mediastinal lymph node enlargement， emphysema and pleural thickening in pneumoconiosis （P<0.01）. The consistency of the two methods was poor（Kappa<0.4）. Conclusion There is a significant difference in chest CT and DR imaging findings of pneumoconiosis. CT can more accurately reflect the morphological changes of pneumoconiosis， and can more accurately reflect the condition of patients in the diagnosis and staging of pneumoconiosis.

Influence of psychological capital and psychological contract on job burnout of pediatric nurses

XU Cheng-ling, GUO Xiu-mei, YUAN Ning, ZHANG Jun-hong

2021, 37(1): 11-15. DOI: 10.13329/j.cnki.zyyjk.2021.0002

Abstract ( 3065 )

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Objective To explore the influence of psychological capital and psychological contract on job burnout of pediatric nurses， analyze the intermediary role of psychological contract. Methods From November of 2019 to January of 2020， a cross-sectional survey was conducted among 206 pediatric nurses from three grade-A tertiary hospitals and three grade-B tertiary hospitals in Qingdao City. Psychological capital scale， psychological contract scale and job burnout scale were used for investigation， and the data were analyzed. Results The psychological capital score of pediatric nurses was 80.42±14.28， the psychological contract score was 91.46±16.28， and the job burnout score was 67.28±15.44. The psychological capital of pediatric nurses was negatively correlated with the job burnout（r=-0.589， P<0.01）， the psychological contract was negatively correlated with the job burnout（r=-0.637， P<0.01）， and the psychological capital was positively correlated with the psychological contract （r=0.652，P<0.01）. The psychological contract partially mediated the relationship between psychological capital and job burnout of pediatric nurses. The direct and indirect effects of psychological capital on job burnout were -0.533 and -0.351， respectively. Conclusion Psychological capital has a direct negative predictive effect on the job burnout of pediatric nurses， and psychological contract has a negative intermediary effect between psychological capital and job burnout. It is necessary to improve the level of psychological capital and psychological contract of pediatric nurses， and then reduce their level of job burnout.

Effect of Tai Chi Chuan exercise on immune function in patients with coal workers' pneumoconiosis

LI Chao, YUAN Bao-jun, SHAO Zhong-da, CUI Jing-jing, ZHANG Shu-qing

2021, 37(1): 16-19. DOI: 10.13329/j.cnki.zyyjk.2021.0003

Abstract ( 1684 )

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Objective To explore the effect of Tai Chi Chuan exercise on immune function in the patients with coal workers' pneumoconiosis（CWP）. Methods Totally 35 CWP inpatients in Kailuan Occupational Disease Prevention and Control Hospital were selected from February 1-28 in 2019， they voluntarily taken the Tai Chi Chuan exercise seven times every week， one hour every time for three months. At one day before exercise and the second day after three months of exercise， the percentages of lymphocytes subsets CD3⁺， CD3⁺CD4⁺， CD3⁺CD8⁺， CD19⁺， CD16⁺+56⁺， the percentages of regulatory CD4⁺CD25⁺ T cells and CD19⁺CD25⁺ B cells were determined by a flow cytometer in the peripheral blood collected from CWP patients. The levels of serum immunoglobulin G（IgG）， IgM， IgA and CH50， C3， C4 complements were measured using immune-turbidimetric assay. Results After exercise， the levels of peripheral blood CD16⁺+56⁺ cells significantly increased as compared with before exercise，and the difference was statistically significant （P<0.05）. There were no significant differences in the levels of CD3⁺， CD3⁺CD4⁺，CD3⁺CD8⁺， and CD19⁺ cells （P>0.05）. However， the levels of CD4 ⁺CD25 ⁺ T cells and CD19 ⁺CD25 ⁺ B cells and the ratios of CD4 ⁺CD25⁺/CD4 ⁺ and CD19⁺CD25 ⁺/CD19 ⁺ after exercise significantly decreased as compared with before exercise， and the differences were statistically significant（all P<0.05）. The level of serum CH50 after exercise was significantly higher than that before exercise （P<0.05）， and the difference was statistically significant（P<0.05）. There were no significant differences in the levels of serum IgG， IgA， IgM， C3 and C4 （all P>0.05）. Conclusion Tai Chi Chuan exercise might affect the proportions distribution of peripheral blood lymphocyte subsets and the levels of complement component expression， and then affect the immune function of CWP patients.

Application of ICMM assessment model in occupational health risk assessment of a metal surface treatment enterprise

QIU Yi-bing, BIAN Huan-feng, LIN Bai-min, LIN Wei-tao, DAI Hao, ZHANG Su-li, LI Xiao-man, LI Yao-cheng, ZHOU Ya-ni

2021, 37(1): 20-23. DOI: 10.13329/j.cnki.zyyjk.2021.0004

Abstract ( 1897 )

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Objective To evaluate the status quo of occupational hazards in a metal surface treatment enterprise by using occupational health risk assessment model issued by the International Council on Mining and Metals（ICMM）， provide basis for the risk management and control of occupational hazards in metal surface treatment industry. Methods From August 2019 to June 2020， the qualitative and quantitative assessment methods of ICMM model were used to evaluate the occupational health risk in the workplace of a metal surface enterprise. The accuracy of the occupational health risk assessment results were verified by referring to the occupational health examination results of the enterprise. Results The results of silica dust， sodium hydroxide， phosphoric acid， sulfuric acid， hydrochloric acid， toluene and xylene in a metal surface treatment enterprise by quantitative occupational health risk assessment were unacceptable， which the RR values were 8 000， 900， 900， 900， 900， 6 000 and 6 000， respectively. And the RR value of nitrogen dioxide was 18， and the assessment result was potential risk. By the qualitative assessment method， the assessment results of silica dust， toluene and xylene were high risk， while the results of sodium hydroxide， phosphoric acid， sulfuric acid， hydrochloric acid and nitrogen dioxide were low risk. The comparison of occupational health examination results and risk assessment results showed that the quantitative assessment results of sandblasting， chemical polishing and anodic oxidation positions were consistent with the results of occupational health examination， the result of qualitative assessment of sandblasting position was consistent with results of occupational health examination， and the results of quantitative and qualitative assessment of neutral positions were inconsistent with the results of occupational health examinations. Conclusion ICMM model can be applied to the occupational health risk assessment of occupational hazardous factors in the workplace of the metal surface treatment industry， and the assessment result of quantitative method is more in line with the actual situation of occupational hazards in the industry than that of qualitative method.

Changes and clinical significance of atherosclerosis related indexes in patients with occupational asthma

BI Yu-lei, HU Ying-hua, QIU Li-li, WU Di, JIANG Xiu-Ling, WANG Chun-lian, JIN Hui, MA Long, FENG Ke-yu, DING Hong

2021, 37(1): 24-28. DOI: 10.13329/j.cnki.zyyjk.2021.0005

Abstract ( 1499 )

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Objective To observe the changes of atherosclerosis related indexes in patients with occupational asthma （OA）.Methods From July 2017 to June 2018， 102 OA patients were selected as the case group （they were divided into mild<5 years subgroup， mild≥5 years subgroup， moderate-severe<5 years subgroup and moderate-severe≥5 years subgroup according to the course and severity of disease）， while 30 healthy adults served as control group. Color Doppler ultrasound， arteriosclerosis detector and biochemical detector were used to test the total cholesterol（TC）， triglyceride（TG）， high density lipoprotein cholesterol （HDL-C）， C-reactive protein （CRP）， homocysteine （Hcy）， serum uric acid （UA）， glycosylated hemoglobin （HbA1c）， carotid intima-media thickness（IMT） and ankle brachial index（ABI）. Results Inflammatory cytokine and other indexes: Compared with the control group， CRP level in the four subgroups of the case group were increased. Except for the mild <5year subgroup， the levels of TC， LDL-C， TG and HCY in the other three subgroups were increased， while HDL-C levels were decreased. Among subgroups， the levels of TC， LDL-C， TG and CRP in severe illness or long course groups were increase， while HDL-C levels were decreased. All differences were statistically significant（P<0.05）. Atherosclerosis indexes: Compared to the control group， IMT level and IMT abnormal rate in mild ≥5 years subgroup and two moderate-severe subgroups were increased， while ABI level in two moderate-severe subgroups were decreased. Among subgroups， IMT level in severe illness or long course groups were increased. All differences were statistically significant（P<0.05）. Conclusion The atherosclerosis related indexes in patients with OA are increased or abnormal， and aggravated with the extension of course and severity of illness.

Influence of exposure to mercuric chloride by drinking water on percentage of T cells and B cells in spleen of mice

CAI Hui-ying, WANG Sheng-min, WANG Ming-yue, JIN Guang-bi

2021, 37(1): 29-32. DOI: 10.13329/j.cnki.zyyjk.20201028.002

Abstract ( 1311 )

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Objective To explore the influence of exposure to mercuric chloride by drinking water on percentage of T cells and B cells in spleen of mice. Methods Seven-week-old female BALB/c mice were randomly divided into control group and three mercuric chloride-treated groups at different time to body weight， 10 in each group. The control group drank double distilled water， and mercuric chloride-treated groups drank mercuric chloride solution of 15 mg/L. At 1， 2 and 3 weeks after exposure， the cytometry was used to measure the number of splenocytes， the percentages of T cells， B cells and T cell subpopulations in the spleen， and the percentage ofregulatory Tcells（Treg） among CD4⁺T cells. Results Mercury chloride significantly increased the spleen weight at the first week of exposure， and significantly increased the kidney weight at the third week of exposure. The number of splenocytes was not affected by mercuric chloride. The percentages of T cells[（27.98±3.06）%]， CD4⁺ T cells[（19.58±2.06）%] and CD8⁺ T cells[（9.62±1.10）%] in the spleen decreased significantly since the first week of exposure（all P<0.05）， and the changes were most obvious at the second weeks， on the time-dependent manner. Meanwhile， the effect of mercuric chloride on the percentage of B cells was opposite to T cells. At the first week of exposure， mercury chloride significantly increased the percentage of Treg [（14.25±1.41）%] among CD4⁺ cells. Conclusion Exposure to mercuric chloride via drinking water alters the percentages of T cells， B cells and T cell subpopulations in the spleen of mice， and increases the percentage of Treg among CD4⁺ cells.

Study on mechanism of morusin inhibiting glioma cells through Wnt/β-catenin signaling pathway

YANG Lu, ZHOU Yi, BAO Yi, SUN Qiang, LIU Guang-jian, CHEN Jun

2021, 37(1): 33-36. DOI: 10.13329/j.cnki.zyyjk.2021.0007

Abstract ( 1343 )

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Objective To investigate the anticancer effect of moristin on glioma cells. Methods Cells proliferation was examined by CCK-8. Migration assays were performed using transwell assay. Apoptotic cells were detected using the Annexin V-FITC apoptosis detection kit. Western blotting and real time fluorescence quantitative PCR（RT-qPCR） were used to exam the change of target gene in mRNA and protein level. Results Morusin can obviously inhibited the proliferation activity of U251 cells（P<0.05）， of which 100 and 1000 μg/mL had the best inhibitory effect. 100 μg/mL of morusin can obviously inhibited the migration ability of U251 cells and induce cell apoptosis（both P<0.05）. Wnt/β-catenin signaling pathway was involved in anti-tumor activity induced by moristin， and morusin can down-regulate the expression of Wnt/β-catenin signaling pathway-related proteins （β-catenin and Cyclin D1（P<0.05）. Conclusion Morusin can inhibit the growth of glioma cells through Wnt/β-catenin signal pathway. Thus，morusin could be a potential anti-cancer agent for glioma.

Investigation on pesticide and heavy metal residues of late vegetable in Zengcheng District of Guangzhou

HUANG Yi-tao, WEN Xue-ji, ZHENG Li-wen, PAN Yi-rou, LIE Li-kun, LUO Wei-qian

2021, 37(1): 37-40. DOI: 10.13329/j.cnki.zyyjk.2021.0008

Abstract ( 1445 )

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Objective To investigate the pesticide and heavy metal residues of late vegetable in Zengcheng District of Guangzhou.Method From November 2018 to February 2019，59 samples were randomly selected from supermarkets， fixed and temporary peddlers in farmers' markets in Zengcheng District of Guangzhou. 16 pesticide residues and 3 heavy metal residues were tested for all samples according to the national standard method. Results The total qualified rate of pesticide and heavy metal residues in 59 samples was 100.0%. The total detection rate of pesticide residues in samples was 18.4%（174/944）， and the total detection rate of heavy metal indicators was 45.8%（81/177）. Conclusion The quality of local late vegetable is relatively good in Zengcheng District of Guangzhou. The pesticide and heavy metal residues are low， while the accumulation of heavy metals caused by environmental pollution is still worthy of attention.

Analysis on health literacy of traditional Chinese medicine among residents in some areas of Hebei Province in 2019

WEI Chen-xi, WANG Kai-meng, XIAO Fan-ya, FAN Shi-shun, YANG Ming-xuan, YAN Shi, FENG Feng-lian

2021, 37(1): 41-45. DOI: 10.13329/j.cnki.zyyjk.2021.0010

Abstract ( 1484 )

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Objective To understand the health literacy level of traditional Chinese medicine（TCM） among residents in some areas （Shijiazhuang， Baoding， Hengshui） of Hebei Province， analyze the main influencing factors， and provide theoretical basis for formulating corresponding health education intervention strategies. Methods A total of 505 residents in some areas of Hebei Province were surveyed and analyzed from December 2019 to January 2020 through face-to-face administration and online questionnaires. Results There were totally 490 valid questionnaires， and the effectiveness was 97.03%. The overall holding rate of TCM health literary was 13.27%. The holding rate of five dimensions of TCM cultural knowledge， information comprehension ability， basic concepts， healthy lifestyle， and universally-accepted method was 44.08%， 35.92%， 28.78%， 16.53% and 5.31%，respectively. There was statistically significant difference in holding rate of TCM health literary among residents with differentannual income（P<0.05）. There were statistically significant differences in holding rate of TCM cultural knowledge among residents in different location， educational level， and self-evaluation health status（all P<0.05）. There were statistically significant differences in levels of universally-accepted method among residents with different occupations and annual family income last year（all P<0.05）. Conclusion Residents in some areas of Hebei Province have a low level of TCM health literacy. It is necessary to strengthen cultural popularization and compilation of relevant textbooks， give full play to the advantages of the times and make use of new media technology for publicity and education， so as to further improve the level of TCM health literacy in some areas of Hebei Province.

Analysis on current situation and trend of death causes of diseases and injuries among residents in urban area of Shenyang City in 2019

WANG Dong, DONG Gui-hua, CHEN Jian-ping, JIANG Zhi-xin

2021, 37(1): 46-50. DOI: 10.13329/j.cnki.zyyjk.2021.0011

Abstract ( 1692 )

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Objective To understand the characteristics of death caused by diseases and injuries among residents in urban area of Shenyang City， provide a basis for formulating health prevention and control policies. Methods According to the ICD-10 code， the total cause of death database was classified， and the sex mortality rate， age mortality rate，standardized mortality， death composition ratio and related indicators of urban residents in Shenyang City in 2019 were calculated. The trend of mortality and life expectancy of urban residents in Shenyang City was analyzed from 2003-2019. Results In 2019， the crude mortality rate of Shenyang urban residents was 904.75/lakh （1 056.75/lakh for male， 760.59/lakh for female）， and the standardized mortality rate was 337.13/lakh（409.08/lakh for male， 270.49/lakh for female）. The crude mortality rate of infant was 0.215%（0.276% for male, 0.149% for female）， and neonatal deaths accounted for 63.64% of infant deaths. In 2019， the crude mortality rate of urban residents increased with age（X²=201 771.752， P<0.05）. The crude mortality rate and standardized mortality rate of males were higher than those of females. From 2003-2019， the crude mortality rate of urban residents increased with the change of years （X²=4 416.183， P<0.05）， while the standardized mortality rate showed downward trend（X²=148.285， P<0.05）. In 2019 the chronic non-communicable diseases were the leading cause of death among Shenyang urban residents，accounting for 82.65% of all deaths. The top three causes of death in sequence were heart disease， tumor and cerebrovascular disease， and the top five deaths of malignant tumors were lung cancer， colorectal cancer， liver cancer， stomach cancer and breast cancer. From 2013-2019， the life expectancy of Shenyang urban residents was generally on the rise，and the life expectancy in 2019 was 80.85 years. Conclusio Chronic non-communicable diseases seriously threaten the lives and health of Shenyang urban residents. Shenyang City should continue to carry out in-depth interventions on risk factors for chronic disease behaviors，advocate healthy lifestyles， solidly promote five cancer screenings， and strengthen the targeted prevention and control of children， men， pregnant women and the elderly.

Analysis on HIV infection and influencing factors among MSM population in Anshan City from 2016-2019

ZHAO Wen-bin, SU Qiu-ju, YIN Ye, WU Di

2021, 37(1): 51-55. DOI: 10.13329/j.cnki.zyyjk.2021.0012

Abstract ( 1622 )

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Objective To understand the human immunodeficiency virus（HIV） infection and itsinfluencing factors among men who have sex with men（MSM） in Anshan City， provide the basis for the formulation of targeted prevention and control strategies. Methods The AIDS sentinel monitoring data of MSM in Anshan City from 2016-2019 were analyzed. Results Among 1 600 respondents，the positive rate of HIV antibody was 9.44%， showing a downward trend year by year（χ²_trend=7.789， P<0.01）， and the positive rate of syphilis was 6.25%， showing a downward trend year by year（χ²_trend=85.280， P<0.01）. The awareness rate of AIDS knowledge was 92.69%. In the last six months， 94.63% of them had homosexual anal sex. The rate of condom use in the last homosexual anal sex was 84.08%， and the persistent condom use rate in homosexual anal sex in the last six months was 65.52%. In the past year，94.63% of them had received AIDS prevention services. MSM with low education level and syphilis had higher risk of HIV infection. MSM who insist on using condom during homosexual anal sex in the last six months had lower risk of HIV infection.Conclusion The HIV infection rate of MSM in Anshan City from 2016-2019 is still at a high level. It is necessary to take targeted publicity and intervention measures for MSM with different characteristics and strengthen STD prevention and control， to further control the spread of HIV.

Analysis on the prevalence and risk factors of metabolic syndrome among occupational population aged 35-75 years old in Shunyi District of Beijing

JIA Jia, XIAO Chun-li, WAN Yang

2021, 37(1): 56-62. DOI: 10.13329/j.cnki.zyyjk.2021.0013

Abstract ( 1552 )

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Objective To describe the epidemic characteristics of metabolic syndrome（MS） and its components in the occupational population aged 35-75 years old in Shunyi District of Beijing， and analyze the related risk factors of MS. Methods Using the cross-sectional survey method， the physical measurements and questionnaire surveys were conducted on the residents aged 35-75 years old in Shunyi District of Beijing from 2017-2019. And the data were analyzed. Results A total of 12 716 occupational populations were included in this survey， and the prevalence rate of MS was 27.77% （standardized rate was 25.95%）. Among them， 5 510 were males（43.33%） and the prevalence rate was 32.29% （standardized rate was 31.21%）， 7 206 were females（56.67%）， and the prevalence rate was 24.31%（standardized rate was 21.92%）. Among all occupational groups，professional and technical personnel had the highest standardized prevalence rate（32.00%）， and administrative staff had the lowest（22.76%）. The prevalence of all age groups， the 35-＜60 age group， men were significantly higher than women （P <0.01）， the 70-75 age group， women were significantly higher than men（P<0.01）， the prevalence rate increased with age（P<0.01）. The prevalence of overweight or obesity， hyperglycemia ，hypertension and dyslipidemia of the four indicators of MS were 63.37% ， 21.66% ，54.00% and 37.82%. Males were significantly higher than females（all P<0.01）， and the rate increased with age（P<0.01）. The 35-＜60-year-old age group mainly manifested as overweight or obesity. As the age increases， the 60-75-year-old age group became primarily manifested as hypertension. Overweight or obesity always existed in all age groups. Older age， male， junior high school education and below， history of kidney or ureteral stone disease，smoking， secondhand smoke in office for ≥4 days per week，and alcohol consumption were the risk factors for MS（all P<0.05）. Conclusion The prevalence of MS is high in Shunyi District of Beijing， mainly manifested as overweight， obesity， hypertension， and a trend of younger men. Intervention should be focused on men， low-educated， smoking， drinking， and people with a history of stone diseases. Reasonable workplace exercise interventions should be provided for the "sedentary mode" office population

Influence of physical exercise on social anxiety of left-behind children in rural areas in Shannxi Province and mediator and moderator role of perceived social support

JIA Nai-jia

2021, 37(1): 63-66. DOI: 10.13329/j.cnki.zyyjk.2021.0014

Abstract ( 1573 )

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Objective To explore the influence of physical exercise on social anxiety of left-behind children in rural areas， verify the mediator and moderator role of perceived social support. Methods From October to November 2019， 292 left-behind children in rural areas were investigated by the physical exercise rating scale， perceived social support scale（PSSS） and social anxiety scale for children （SASC）， and the data were analyzed. Results The score of physical exercise in rural left-behind children was 1.32±0.59， the score of social anxiety was 6.79 ±4.31， and the score of perceived social support was 54.18 ±14.48. The physicalexercise had significant effect on social anxiety of rural left-behind children（r=-0.211， P<0.01）， while the exercise time， intensity and frequency had significant negative effects on social anxiety （r=-0.219， -0.069， -0.093， all P<0.01）. The perceived social

support had significant effect on social anxiety（r=-0.227， P<0.01）， while family support， friend support and other support had

significant negative effects on social anxiety（r=-0.168， -0.199， -0.203， all P<0.01）. The perceived social support played mediator and moderator role between physical exercise and social anxiety of left-behind children in rural areas. Conclusion The perceived social support has a positive effect on reducing social anxiety and participating in physical exercise of left-behind children. It is suggested that special attention should be paid to the effect of perceived social support in the process of mental health education

and school physical education of rural left behind children.

Mediating effect of stress level on relationship between willpower and mental health of first aid officers in coal mine enterprises

ZHANG Li, YUE Ling-mei, ZHU Ze-jun, JIANG Ke, MA Wen-you

2021, 37(1): 67-70. DOI: 10.13329/j.cnki.zyyjk.2021.0015

Abstract ( 1314 )

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Objective To explore the relationship among willpower， stress perception and mental health of first aid officers in coal mine enterprises. Methods From April 2017 to May 2018， 193 first aid officers from some coal mine enterprises in Tangshan were selected. SymptomChecklist-90（SCL-90），Willpower Scale and Self-rating Stress Scale（SSQ-53）were used for questionnaire survey，and the data were analyzed. Results The scores of somatization factor（1.65±0.38）， obsessive-compulsive symptom factor（1.74±0.57），interpersonal relationship disorder factor（1.75±0.50） and psychotic factor（1.36±0.40） among first aid officers from some coal mining enterprises were higher than the national norms， and the differences were statistically significant（all P<0.05）. The willpower of first aid officers in coal mine enterprises was significantly negatively correlated with the total score of SCL-90， and the scores of somatization， obsessive-compulsive symptoms， interpersonal disorder， depression， anxiety， hostility， terror，paranoia， psychosis and other factors in SCL- 90 （r=-0.366， -0.227，-0.349，-0.268，-0.419，-0.304， -0.292，-0.299，-0.349， -0.289，-0.184， all P<0.05）.Willpower was negatively correlated with stress level and mental health level（r=-0.156，-0.349， both P<0.05）， while stress level was positively correlated with mental health（r=0.459，P<0.05）. The stress level had a strong mediating effect between willpower and mental health， and the total moderating effect between willpower and mental health was 18.56%. Conclusion The first aid officers in coal mine enterprises have poor mental health level than general population，with sensitive interpersonal relationship， obvious compulsive thinking and behavior. The level of psychological stress of first aid officers affects the level of mental health， and the level of stress has a strong mediating effect between willpower and mental health.

Observation on the effect of Baduanjin combined resistance training of elastic band on perceived stress and sleep quality of special service recuperating officers and soldiers

GENG Wei, ZHU Yan-ling, LIU Yuan, XU Han-han, WANG Zi-bing, CHEN Ying

2021, 37(1): 71-75. DOI: 10.13329/j.cnki.zyyjk.2021.0016

Abstract ( 1350 )

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Objective To understand the effect of Baduanjin combined the resistance training of elastic band on the perceived stress and sleep quality of special service recuperating officers and soldiers， and provide a reference for the maintenance of the physical and mental health of the recuperating officers and soldiers. Methods Totally 68 young and middle-aged recuperating subjects who were concentrated in a special service recuperation center in July 2019 were selected. The subjects were randomly divided into control group and intervention group using a random number table method. 30 in the control group received conventional recuperation， while 38 in the intervention group were given extra Badanjin combined resistance training of elastic band exercise for four weeks. The Pittsburgh Sleep Index Questionnaire（PSQI） and the Chinese version of the Perceived Stress Scale（CPSS） were used to evaluate the perceived stress and sleep quality of recuperating subjects before and after the intervention，describe the overall sleep status and analyze and compare the subjects' perceived stress level under different sleep indicators and its correlation. Results Before the intervention， the positive rate of sleep disorder among special service recuperating officers and

soldiers was 51.47%. After intervention， the score of CPSS and PSQI of the intervention group was 20.66±5.41 and 4.45±2.61，

which were significantly lower than before the intervention（P<0.05）. The CPSS score of control group was 27.90±7.29， which was not significantly lower than before（P>0.05）， and the PSQI score was 6.50±2.58， which was lower than before （P<0.05）. The CPSS score and improvement of PSQI of the intervention group were significantly higher than those of the control group， and the differences were statistically significant （both P<0.01）. Conclusion The special service recuperating officers and soldiers have higher level of perceived stress and poor sleep quality. Baduanjin combined resistance training of elastic band can significantly reduce the stress levels and improve their sleep quality.

Investigation on the status quo of nurses' professional well-being in military hospitals and analysis of influencing factors

ZHAO Ying, LIU Xi-wen, ZHANG Lin-yuan, SHI Rui-jie, XU Lei, CAO Qi-you, HU Shan-bo

2021, 37(1): 76-79. DOI: 10.13329/j.cnki.zyyjk.20201019.004

Abstract ( 2174 )

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Objective To investigate the status quo of nurses' professional well-being in military hospitals and analyze its influencing factors. Methods From September to December 2019， 396 nurses were selected from 4 central military hospitals in Tibet， Qinghai, Shaanxi and Henan Provinces by convenient sampling. General information questionnaire， medical workers' occupational well-being scale， self-rating anxiety scale， self-rating depression scale，social support rate scale were used for the questionnaire survey. Results The total score of the occupational well-being of nurses in military hospitals was 78.05 ±16.22. Multiple stepwise

regression analysis showed that marital status， number of night shifts per week， working hours per week， sleep time per day，depression and social support were influencing factors of occupational well-being（β=-2.651，-4.255，-2.003，-3.310， -2.930，5.770，all P＜0.05）. Conclusion The occupational well-being of nurses in military hospitals is at a medium level. The society， hospitals，and nurses should work together to improve their professional well-being in multiple ways

Analysis on hygienic monitoring of public places in Davos World Economic Forum of Dalian City from 2011-2019

ZHANG Yi, HAN Xue-rong, GUO Qi

2021, 37(1): 80-83. DOI: 10.13329/j.cnki.zyyjk.2021.0017

Abstract ( 1203 )

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Objective To analyze the hygienic monitoring of public places in the reception units of Davos World Economic Forum in Dalian City from 2011-2019， provide scientific basis for strengthening supervision and management in public places of Dalian City. Methods Sampling and inspection of indoor environment and public supplies in public places of reception units of Davos World Economic Forum in Dalian City from 2011-2019 were conducted in accordance with the Standard Sanitary Inspection Method for Public Places， and the data was analyzed using SPSS 20.0. Results There were 230 qualified ones into 335 air monitoring points in the public places of Davos World Economic Forum in Dalian City from 2011-2019， the qualified rate was 68.66%， and the difference was not statistically significant （P >0.05）. There were 2 774 qualified items among 2 893 air quality monitoring items in public places， the qualified rate was 95.89% ， and the difference was not statistically significant （P>0.05）. There were 2469 qualified items among 2 483 public supplies monitoring items， the qualified rate was 99.44%， and the difference was not statistically significant（P>0.05）. There were 381 qualified items among 405 monitoring items of swimming pool water， the qualified rate was 94.07%， and the difference was not statistically significant（P>0.05）. There were 444 qualified items among 483 monitoring items for ventilation system of the centralized air conditioning water， the qualified rate was 91.93%， and the differencewasstatistically significant（P<0.05）. Conclusion The hygienic monitoring status of public places in the reception units of Davos World Economic Forum in Dalian City from 2011-2019 is generally good. The health administrative department still needs to strengthen supervision， monitoring， publicity and education， to protect public health.

Analysis of drinking water quality monitoring results in Bincheng District of Binzhou City from 2015-2019

YU Jun-xian, GANG Hui-jun

2021, 37(1): 84-87. DOI: 10.13329/j.cnki.zyyjk.20201027.003

Abstract ( 1583 )

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Objective To understand the hygienic status of drinking water quality for residents in Bincheng District of Binzhou City， provide a scientific basis for improving the quality of drinking water. Methods From 2015-2019， in accordance with GB/T5750-2006 Standard examination methods for drinking water， the drinking water from 10 towns/streets in Bincheng District during dry season and wet season was sampled and detection. Results A total of 400 drinking water samples were examined from 2015-

2019， and the total qualified rate was 53.8%. The indexes of total number of colonies， aluminum， visible matter， turbidity，

nitrate（calculate according to N）， chlorate and free residual chlorine/chlorine dioxide were unqualified to varying degrees， and the unqualified rate was 12.3%， 32.0%，1.0%，3.8%，5.0%，0.8% and 15.0%， respectively. Conclusion The qualified rate of drinking water in Bincheng District of Binzhou City from 2015-2019 is low， and the unqualified rates of aluminum， free residual chlorine/chlorine dioxide and total number of colonies in water are higher. The relevant departments should take appropriate measures to ensure the health and safety of drinking water for the residents.

Role of interaction anxiousness and alexithymia between mobile phone addiction and life satisfaction of freshmen

HOU Yu-tao, ZHANG Shuo, HOU Yuan-yuan, YANG Zhen-hao, GUO Si-jie, XU Chun-shan

2021, 37(1): 88-91. DOI: 10.13329/j.cnki.zyyjk.2021.0018

Abstract ( 1735 )

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Objective To explore the influence and mechanism of mobile phone addiction， interaction anxiousness and alexithymia on life satisfaction. Methods A total of 1 028 freshmen in a medical college in Shandong Province were investigated with the Mobile Phone Addiction Tendency Scale（MPATS）， Interaction Anxiety Scale（IAS）， Toronto Alexithymia Scale（TAS） and Adolescent Student’s Life Satisfaction Scale（ASLSS） in September 2018. Results Mobile phone addiction was positively correlated with interaction anxiousness and alexithymia （r=0.325， 0.546， both P<0.01）， and negatively correlated with life satisfaction （r=-0.278， P<0.01）. Bootstrap mediating effect test showed that the mediating effect value of IAS score between MPATS score

and life satisfaction was -0.052， accounting for 18.71% of the total effect， the mediating effect value of TAS score between MPATS score and life satisfaction was -0.180， accounting for 64.75% of the total effect， and the value of chain mediated effect nof IAS and TAS score between cell phone addiction and life satisfaction was -0.035， accounting for 12.59% of the total effect. Conclusion Interaction anxiousness and alexithymia of freshmen completely mediate the influence of mobile phone addiction on life satisfaction

Construction of college students' physique early warning model based on multi-dimensional data fusion

KOU Lei, XU Chang-nan, DENG Jie

2021, 37(1): 92-96. DOI: 10.13329/j.cnki.zyyjk.20201028.003

Abstract ( 1155 )

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Objective To put forward the idea of constructing an early warning model for college students' physique， help college students to make reasonable predictions on each physical test item level by comparing the performance effects of different models in forecasting， so as to achieve the purpose of early warning. Methods On the basis of collecting the 2015-2018 physical measurement data of Nanjing University of Aeronautics and Astronautics， using data mining technology， after data understanding and data preparation， three machine learning algorithms such as Random Forest Algorithm， Gradient Boosting Decision Tree Algorithm and Neural Network Algorithm were used to build the model and evaluation. Results From the perspective of the prediction effect on the final physical grade of boys， the accuracy rate was between 90% and 97%，and the accuracy rate of the Gradient Boosting Decision Tree method was always better than the other two. When the training set ratio was 80%，the highest prediction rate reached 96.19%. From the perspective of predicting the final fitness level of girls，the accuracy rates of Random Forest and Gradient Boosting Decision Tree methods were between 90% and 96%，while the accuracy rates of Neural Networks methods were between 80% and 87% . When the training set ratio was 80%， the Gradient Boosting Decision Tree method achieved the highest accuracy rate of 95.06%. Conclusion It is feasible to construct an early warning model for college students' physique，and the prediction accuracy of the final physique grade can reach more than 93%， of which the Gradient Boosting Decision Tree method has the best performance.

Effect of different interventions on sleep quality of nursing staff: a network meta-analysis

LIU Jun-er, CAO Wei-jie, LI Long

2021, 37(1): 97-102. DOI: 10.13329/j.cnki.zyyjk.20201020.001

Abstract ( 1385 )

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Objective To systematically evaluate the effects of different interventions on sleep quality of nursing staff. Methods Randomized Controlled Trials（RCTs） about the effects of different interventions on sleep quality of nursing staff were searched from PubMed， Embase， Medline， CINAHL， The Cochrane Library， CNKI， CBM， Wanfang and VIP databases by computer retrieval. The Cochrane Library risk quality assessment tool was used for literature evaluation and grade evaluation. Review Manager 5.2 was used for traditional meta-analysis and ADDIS 1.16.8 was used for network meta-analysis. Results A total of 12 articles and 11 interventions were included，involving 1 007 nurses. Traditional meta-analysis showed that the non drug intervention measures could effectively improve the sleep quality of nursing staff （MD=-2.73，95%CI ：-3.42--2.04）， and the difference was statistically significant （P<0.01）. Network meta-analysis showed that auricular points plaster therapy could effectively reduce the PSQIscore of nursing staff as comparedwith routine nursing intervention（MD=-4.70， 95%CI：-9.26 0.04）， and the difference was statistically significant（P<0.05）. The probability ranking results showed that in the routine nursing groups，auricular points plaster therapy >cognitive behavior intervention +EEG biofeedback >recovery experience intervention >group psychological intervention>humanized management>scraping>routine nursing. Conclusion Non drug intervention can effectively improve the sleep quality of nursing staff. Compared with routine nursing measures， auricular points plaster therapy can improve the sleep quality of nursing staff.

Meta analysis of the association between smoking and Alzheimer's disease

LIANG Li-ming, CHEN Wen-zhi, YU De-e, BAI Shu-tang, FU Hong-du

2021, 37(1): 103-106. DOI: 10.13329/j.cnki.zyyjk.20201019.003

Abstract ( 1581 )

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Objective To systematacially evaluate the correlation between smoking and Alzheimer's disease（AD）. Methods PubMed，OVID， Elsevier， VIP， CNKI， WanFang and CBM databases were electronically searched to collect case-control studies and cohort studies on the association of smoking and AD. The time was from the database establishment to December 2019. Extracted data from those studies， then meta-analysis was performed with RevMan 5.3 software. Results A total of 9 case-control studies and 5 cohort studies were included. The heterogeneity of 9 case-control studies was I²=56%，P<0.05， random effect model was selected for analysis. The results were OR=0.73，95%CI：0.57-0.94，P<0.05. The heterogeneity of 5 cohort studies was I²=86%， P<0.05， and the random effect model was selected for analysis. The results were RR=0.88，95%CI：0.62-1.26，P>0.05. Conclusion Suggest that smoking exposure may be a protective factor for AD， but affected by the quantity and quality of the included literature， the above conclusions need to be verified by more high-quality studies.

Occupational health status of 150 enterprises in Fushun City

DING Jing-hua, DENG Xiao-qiang, CAI Zhe, CUI Ying, XIA Ying

2021, 37(1): 107-109. DOI: 10.13329/j.cnki.zyyjk.2021.0022

Abstract ( 1303 )

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Objective Through occupational health survey， to study the status of occupational health in 150 enterprises in Fushun City. Methods From September to November 2019， a questionnaire survey was conducted using a unified questionnaire to investigate the occupational health of 150 enterprises in Fushun City. The comparison of the count data rates was performed by χ² test. Results The declaration rate of occupational hazards in 150 enterprises was 46.7% ， and the rate of occupational health training for workers was 98.0%. The physical factors had the highest rate of exceeding the standard（41.2%）， and the exceeding standard rate of dust was 4.9% . The rate of physical examination for workers exposed to chemicals reached 96.6% ， and the rate of physical examination for workers exposed to dust was the lowest（87.4%）. The difference in physical examination rate among workers exposed to different occupational hazards was statistically significant （P<0.01）. Conclusion The declaration rate of occupational hazards in 150 enterprises in Fushun City is relatively low， and the training rate of workers is relatively high， and the physical factors in the workplace exceed the standard seriously. The relevant departments should strengthen the supervision， improve the declaration rate of occupational hazards in the enterprises， and the enterprises should take effective measures to control the physical factors in the workplace.

Investigation on status and influencing factors of job burnout among stomatologists in Sichuan Province

CHEN Wen, CHEN Lei, ZHANG Yu-nan, LIANG Bei, QIN Xi-yuan, ZHANG Xin-zhuo

2021, 37(1): 110-113. DOI: 10.13329/j.cnki.zyyjk.2021.0023

Abstract ( 1422 )

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Objective To understand the current situation of job burnout among stomatologists in Sichuan Province， analyze the influencing factors， and put forward reasonable improvement suggestions. Methods From October 2019 to January 2020， Maslach Burnout Inventory General Survey（MBI-GS） was used to conduct stratified（urban） random sampling survey of stomatologists in Sichuan Province， and the influencing factors were analyzed by χ2 test and logistic regression. Results A total of 234 valid questionnaires were collected. The total detection rate of job burnout was 10.7% ， the detection rate of emotional failure was 2.6%， the detection rate of cynicism was 23.5%， and the detection rate of low sense of achievement dimension was 48.3%. The length of service was the main influencing factor of job burnout. Conclusion The general situation of job burnout of stomatologists in Sichuan Province is relatively mild， while the depression of achievement is relatively serious. It is suggested that the improvement measures should be formulated with focusing on how to improve the stomatologists' sense of achievement and more attention should be paid to stomatologists with longer working years.

Evaluation on effect of SWOT analysis on improving quality of convalescent nursing management for submarine officers and soldiers

GUO Ya, ZHAO Jiao, FENG Li-juan, YANG Xu-dong

2021, 37(1): 114-116. DOI: 10.13329/j.cnki.zyyjk.2021.0024

Abstract ( 1109 )

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Objective To explore the impact of applying advantages， disadvantages， opportunities， and threat analysis （SWOT

analysis） in improving quality of convalescent nursing management for submarine officers and soldiers. Methods Totally 420 submarine officers and soldiers who recuperated in Tianjin Rehabilitation Center from April 2018 to April 2019 were selected，and they were divided into two groups， each with 210 cases. The control group received routine recuperation. The observation group implemented SWOT analysis to improve the nursing quality management scores and management scores and nursing satisfaction of submarine officers and soldiers. Results The nursing quality scores of convalescents with SWOT analysis were significantly improved. The treatment area management score was 92.04±30.20， the professional level score was 93.06±30.20， the communication ability score was 95.54±31.20， and the self-identity score was 98.16±33.10， and the differences were statistically significant compared with the control group（all P<0.01）. The satisfaction was also significantly improved， and the difference was statistically significant（P<0.01）. Conclusion The SWOT analysis to submarine officers and soldiers can improve the quality of nursing and satisfaction， and achieve the purpose of real recuperation.

Analysis on sanitary condition of public appliances in public places in Changzhou City from 2017-2019

SHENG Jun-li, CHEN Xiao-yue, CHEN Zhi-yong

2021, 37(1): 117-119. DOI: 10.13329/j.cnki.zyyjk.20201112.003

Abstract ( 1243 )

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Objective To understand the sanitary quality of public appliances in public places in Changzhou City，provide scientific basis for sanitary supervision and management. Methods The sanitary quality of public appliances in public places in Changzhou City from 2017-2019 was investigated， the samples were collected for the detection of microbiological indicators， and the results were statistically analyzed by SPSS 18.0 software. Results The total qualified rate of public appliances in public places in Changzhou City from 2017-2019 was 83.1%（865/1 041）， while the annual qualified rate of public appliances was respectively 89.3% （209/234），74.9%（311/415） and 88.0%（345/392）， and the difference was statistically significant（χ²=32.80, P<0.01）. The qualified rate of public appliances in hotel industry， bath industry and beauty and hairdressing industry was respectively 76.2%（307/403）， 87.7%（199/227） and 87.3%（359/411）， and the difference was statistically significant （χ²=22.37, P<0.01 ）. The qualified rates of total bacterial count in the public appliances of hotel industry， bath industry and beauty and hairdressing industry were lower， which was respectively 76.4%（308/403）， 85.4%（158/185） and 74.0% （148/200）， and the difference was statistically significant（χ²=8.32，P<0.01）. Conclusion The sanitary quality of public appliances in public places is generally poor，and the unqualified index is mainly total bacterial count. It is suggested that the health supervision department should strengthen management to improve the sanitary quality of public places.

Analysis on monitoring results of occupational hazards in 210 enterprises in Huangshi City

LI Xia, SONG Yan-chao, SUN Qiang-guo, SHI Gang, ZHANG Feng-xia, XU Bei-bei

2021, 37(1): 120-123. DOI: 10.13329/j.cnki.zyyjk.20201027.002

Abstract ( 1326 )

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Objective To analyze the monitoring results of occupational hazards in workplace in 210 enterprises of Huangshi City in 2019， understand the basic situation of occupational hazards in Huangshi City， and provide reference for local occupational disease prevention and control. Methods A total of 210 enterprises from six counties/districts in Huangshi City were selected to take the detection of dust， chemical toxicants and physical factors. Results In 2019，210 enterprises were monitored，and 626 of 2 004 exposure points exceeded the limits， with the exceeding rate of 31.24%. The exceeding rate of physical factor， chemical factor and dust was 34.20%，7.25% and 23.93%， respectively. There was statistically significant difference in exceeding rate of different hazard factors（P<0.01）. The exceeding rate of welding fume， coal dust， silicon dust and other dust was 45.45%， 14.29%，40.49% and 9.94%， respectively. There was statistically significant difference in exceeding rate of different dust types（P<0.01）. There were statistically significant differences in the exceeding rate of occupational hazards among enterprises in different counties/districts， scales and industries（all P<0.01）. Conclusion The exceeding rate of occupational hazards in workplaces of key industriesand enterprises in Huangshi City is high. The qualified rate of monitoring needs to be improved， and the supervision of occupational health needs to be strengthened.

Analysis on work engagement and its influencing factors among nurses in grade-A tertiary hospital of Neijiang City

XIAO Jun, LIU Yi

2021, 37(1): 124-126. DOI: 10.13329/j.cnki.zyyjk.2021.0025

Abstract ( 1432 )

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Objective To understand the work engagement and its influencing factors among nurses in grade-A tertiary hospitals of Neijiang City. Methods From November to December， 2019， general information questionnaire and Utrecht work engagement scale-Chinese version（UWES） were used to conduct a questionnaire survey among 520 nurses from three grade-A tertiary hospitals of Neijiang City. And the data were analyzed. Results The score of work engagement in respondents was 4.92±1.15. The scores of each dimension from high to low were dedication（5.04±1.17）， concentration（4.92±1.16） and vitality（4.83±121）. The working years and the department were the factors that affect nurses' work engagement （both P<0.05）. Conclusion The work engagement of nurses in the grade-A tertiary hospitals in Neijiang City is at a high level， and the working years and departments are the factors influencing the work engagement of nurses.

Prevention and control strategies against occupational exposure of fever clinic nurses during COVID-19 epidemic

LIU Jing, WEI Hong-yao, WANG Ying-ying

2021, 37(1): 127-131. DOI: 10.13329/j.cnki.zyyjk.2021.0026

Abstract ( 1296 )

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Through active and effective scientific prevention and control measures， the epidemic situation in China has been basically under control. During Coronavirus Disease 2019（COVID-19） epidemic， the Renmin Hospital of Wuhan University， as one of the first treatment units in large-scale tertiary general hospitals of Wuhan， fought the epidemic comprehensively. The fever clinic became the first bastion for the treatment of COVID-19 patients in the whole hospital， and assumed the functions of screening and classification of COVID-19 patients and emergency treatment during the epidemic. Faced with this novel emergent infectious disease， nurses， as the group that has the closest contact with patients in medical activities， are at risk of directly or indirectly touching novel coronavirus pathogens. In the light of the route of transmission of the COVID-19 and susceptible link，according to the equipment， personnel and operation status of the fever clinics， the targeted management measures are taken from the environmental layout and division management， strengthening the protection and management of disinfection， reasonable allocation of nursing staff， material support， and strengthening personnel training， so as to reduce the occupational exposure hazards to fever clinic nurses， actively prevent the occurrence of occupational exposure， and safeguard the health of nursing staff

Research progress on psychological crisis intervention of officers and soldiers in wartime

MA Zhu-jing, ZHANG Qin-tao, REN Lei, WU Zhong-ying, WANG Yi-di, WANG Qi, YANG Qun

2021, 37(1): 132-136. DOI: 10.13329/j.cnki.zyyjk.2021.0028

Abstract ( 1804 )

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In actual combat， officers and soldiers will face the situation such as fatigued battles， night operations， severe weather， and lone army penetration and they will witness blood， broken arms， corpses at any time. These special circumstances may cause adverse military stress reaction of the combatants， even produce psychological crisis， affecting combat effectiveness. In order to reduce the battle wear and tear caused by psychological problems， the paper reviews the current state of research on psychological crisis intervention and psychological rehabilitation technology， with a view to providing a certain reference for our

military in terms of psychological maintenance during wartime.

Research status and development trend of medical equipment for liquid propellants

QIU Hong-jie, HU Hong-fang

2021, 37(1): 137-140. DOI: 10.13329/j.cnki.zyyjk.2021.0029

Abstract ( 1158 )

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When missile troops are engaged in liquid propellant operation， once an accident occurs， it will threaten the health of operators. Mastering the toxicological characteristics of liquid propellants， the strategies of medical prevention and control， as well as the research status and development trend of medical equipment can effectively guarantee the safety of liquid propellant operators and maintain the combat effectiveness of missile forces. Therefore， the paper summarizes the research status and development trend of liquid propellant medical equipment.

Research progress on mechanism of pancreatic injury and complications induced by cigarette smoke

WANG Ya-qin, LIANG Lu, BAI Feng-xia, ZHANG Li-mei, YANG Wei-hong

2021, 37(1): 141-144. DOI: 10.13329/j.cnki.zyyjk.2021.0030

Abstract ( 1198 )

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Cigarette smoke contains a variety of harmful substances. Long-term exposure can lead to pathological changes and dysfunction of multiple organs. Studies have shown that smoking can damage the endocrine and exocrine functions of pancreas and induce a variety of diseases. But the mechanism of pancreatic injury induced by cigarette smoke is complex and lack of systematic elaboration. This paper summarizes the mechanism of cigarette smoke on pancreatic injury， provided a new idea for disease treatment， and briefly introduced the complications after pancreatic injury， to guard against the harm of cigarette smoke.