Analysis of the correlation between air pollution and emergency ambulance dispatches in Urumqi City under meteorological conditions

Abstract

Abstract:

Objective To understand the distribution characteristics of air pollution and meteorological factors in Urumqi City in 2024，and to explore the correlation between air pollutants and the number of emergency medical treatments for residents. Methods Data were collected on air pollutants，meteorological variables and daily emergency medical visits for residents in Urumqi City in 2024. The air pollution data included daily mean concentrations of SO₂，NO₂，CO，particulate matter 10（PM₁₀） and particulate matter 2.5（PM_2.5） and daily max 8 h average O₃（O_{3-8 h}）. The meteorological data included the daily average temperature，relative humidity，air pressure，wind speed and sunshine duration. The correlation between emergency medical visits and air pollutants was analyzed. Results The daily average concentrations of SO₂，NO₂，CO，O_{3-8 h}，PM₁₀，and PM_2.5 were 5.21 μg/m³，31.82 μg/m³，0.64 mg/m³，88.87 μg/m³，67.65 μg/m³，and 35.58 μg/m³，respectively. Among them，the number of days with exceedance for PM_2.5，PM₁₀，O_{3-8 h} and NO₂ was 51（13.93%），23（6.28%），3（0.82%） and 2（0.55%），respectively. The correlation analysis results showed that the emergency visits were positively correlated with SO₂ and O_{3-8 h}（r_s=0.269，0.404，both P<0.01）. The emergency visits for respiratory diseases were positively correlated with SO₂（r_s=0.188，P<0.01）. The emergency visits for circulatory system diseases were positively correlated with NO₂ and CO（r_s=0.136，0.116，both P<0.05）. The emergency visits for residents aged 0-<65 years were positively correlated with SO₂ and O_{3-8 h}（r_s=0.272，0.434，both P<0.01）. The emergency visits for circulatory system diseases among residents aged ≥65 years were positively correlated with NO₂，CO，PM₁₀，and PM_2.5（r_s=0.127，0.138，0.116，0.118，all P<0.05）. Conclusion PM_2.5 is the main pollutant affecting the air quality in Urumqi in 2024，and the overall level of air pollutants is showing a downward trend. Exposure to air pollutants has a certain impact on emergency medical visits. The impact of emergency visits related to air pollution was higher among residents aged 0-<65 years，while the impact of emergency visits for circulatory system diseases was concentrated among residents aged ≥65 years.

Key words: Air pollutants, Emergency visit, Residents, Correlation

CLC Number:

R122.26

Dilibaier Alimu, Reziyamu , PAN Kai, ZHANG Ying, YANG Haofeng. Analysis of the correlation between air pollution and emergency ambulance dispatches in Urumqi City under meteorological conditions. [J]OCCUPATION AND HEALTH, 2026, 42(20): 2852-2856.

Figures/Tables 6

References 24

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指标	年均值	P₂₅	M	P₇₅	最高值	最低值
气象因素
日均气压（hpa）	907.50	902.30	907.90	913.00	927.10	890.40
日均温度（℃）	8.47	-5.10	10.65	21.40	32.10	-22.20
日均相对湿度（%）	56.66	39.00	57.00	74.00	98.00	9.00
日均风速（m/s）	2.27	1.50	2.10	2.80	6.50	0.40
日照时数（h/d）	7.43	5.10	7.70	10.50	14.80	0.00
空气污染物
SO₂（μg/m³）	5.21	4.33	5.33	6.00	9.83	2.67
NO₂（μg/m³）	31.82	18.83	27.25	42.58	86.67	7.00
CO（mg/m³）	0.64	0.40	0.48	0.78	1.92	0.20
O_{3-8 h}（μg/m³）	88.87	57.13	91.67	118.58	166.17	25.50
PM₁₀（μg/m³）	67.65	32.17	48.75	82.54	856.00	5.83
PM_2.5（μg/m³）	35.58	12.13	18.33	47.58	269.83	4.00
呼吸系统疾病急救人次	8.08	6.00	8.00	10.00	21.00	0.00
性别
男	4.66	3.00	4.00	6.00	12.00	0.00
女	3.43	2.00	3.00	5.00	11.00	0.00
年龄（岁）
0~<65	2.35	1.00	2.00	3.00	11.00	0.00
≥65	5.73	4.00	5.00	7.00	14.00	0.00
循环系统疾病急救人次	31.25	27.00	31.00	35.25	52.00	14.00
性别
男	19.44	16.00	19.00	22.00	36.00	6.00
女	11.81	9.00	11.00	14.00	23.00	3.00
年龄（岁）
0~<65	13.76	11.00	13.00	16.00	26.00	3.00
≥65	17.49	14.00	17.50	20.00	32.00	6.00
总急救人次	238.38	220.00	237.00	255.00	330.00	169.00
性别
男	133.13	121.00	134.00	144.00	180.00	91.00
女	105.25	95.00	105.00	114.00	157.00	74.00
年龄（岁）
0~<65	147.80	133.00	148.50	162.00	210.00	99.00
≥65	90.58	82.00	90.00	97.00	131.00	60.00

指标	年均值	P₂₅	M	P₇₅	最高值	最低值
气象因素
日均气压（hpa）	907.50	902.30	907.90	913.00	927.10	890.40
日均温度（℃）	8.47	-5.10	10.65	21.40	32.10	-22.20
日均相对湿度（%）	56.66	39.00	57.00	74.00	98.00	9.00
日均风速（m/s）	2.27	1.50	2.10	2.80	6.50	0.40
日照时数（h/d）	7.43	5.10	7.70	10.50	14.80	0.00
空气污染物
SO₂（μg/m³）	5.21	4.33	5.33	6.00	9.83	2.67
NO₂（μg/m³）	31.82	18.83	27.25	42.58	86.67	7.00
CO（mg/m³）	0.64	0.40	0.48	0.78	1.92	0.20
O_{3-8 h}（μg/m³）	88.87	57.13	91.67	118.58	166.17	25.50
PM₁₀（μg/m³）	67.65	32.17	48.75	82.54	856.00	5.83
PM_2.5（μg/m³）	35.58	12.13	18.33	47.58	269.83	4.00
呼吸系统疾病急救人次	8.08	6.00	8.00	10.00	21.00	0.00
性别
男	4.66	3.00	4.00	6.00	12.00	0.00
女	3.43	2.00	3.00	5.00	11.00	0.00
年龄（岁）
0~<65	2.35	1.00	2.00	3.00	11.00	0.00
≥65	5.73	4.00	5.00	7.00	14.00	0.00
循环系统疾病急救人次	31.25	27.00	31.00	35.25	52.00	14.00
性别
男	19.44	16.00	19.00	22.00	36.00	6.00
女	11.81	9.00	11.00	14.00	23.00	3.00
年龄（岁）
0~<65	13.76	11.00	13.00	16.00	26.00	3.00
≥65	17.49	14.00	17.50	20.00	32.00	6.00
总急救人次	238.38	220.00	237.00	255.00	330.00	169.00
性别
男	133.13	121.00	134.00	144.00	180.00	91.00
女	105.25	95.00	105.00	114.00	157.00	74.00
年龄（岁）
0~<65	147.80	133.00	148.50	162.00	210.00	99.00
≥65	90.58	82.00	90.00	97.00	131.00	60.00

日期（月）	SO₂ （μg/m³）	NO₂ （μg/m³）	PM₁₀ （μg/m³）	CO （mg/m³）	O_{3-8 h} （μg/m³）	PM_2.5 （μg/m³）
1	5.39	53.25	107.02	1.11	44.39	78.16
2	5.25	45.07	143.37	1.08	76.10	89.18
3	4.90	34.78	69.57	0.66	89.58	39.63
4	4.86	22.67	86.93	0.44	102.39	19.97
5	6.12	19.32	61.60	0.37	114.01	18.20
6	6.23	17.25	33.97	0.36	129.06	11.92
7	5.56	16.47	32.24	0.36	135.17	11.36
8	5.92	20.39	37.53	0.42	125.18	13.25
9	6.37	25.06	39.02	0.49	93.43	13.78
10	4.40	32.92	49.84	0.53	74.51	19.66
11	3.88	43.31	69.79	0.87	42.77	46.56
12	3.67	51.61	84.45	0.99	39.39	67.17

日期（月）	SO₂ （μg/m³）	NO₂ （μg/m³）	PM₁₀ （μg/m³）	CO （mg/m³）	O_{3-8 h} （μg/m³）	PM_2.5 （μg/m³）
1	5.39	53.25	107.02	1.11	44.39	78.16
2	5.25	45.07	143.37	1.08	76.10	89.18
3	4.90	34.78	69.57	0.66	89.58	39.63
4	4.86	22.67	86.93	0.44	102.39	19.97
5	6.12	19.32	61.60	0.37	114.01	18.20
6	6.23	17.25	33.97	0.36	129.06	11.92
7	5.56	16.47	32.24	0.36	135.17	11.36
8	5.92	20.39	37.53	0.42	125.18	13.25
9	6.37	25.06	39.02	0.49	93.43	13.78
10	4.40	32.92	49.84	0.53	74.51	19.66
11	3.88	43.31	69.79	0.87	42.77	46.56
12	3.67	51.61	84.45	0.99	39.39	67.17

指标	SO₂	NO₂	PM₁₀	CO	O_{3-8 h}	PM_2.5	平均气压	平均温度	相对湿度	平均风速	日照时数
SO₂	1.000
NO₂	-0.203^a	1.000
PM₁₀	0.016	0.719^a	1.000
CO	-0.226^a	0.924^a	0.737^a	1.000
O_{3-8 h}	0.599^a	-0.628^a	-0.405^a	-0.694^a	1.000
PM_2.5	-0.160^a	0.837^a	0.904^a	0.880^a	-0.611^a	1.000
平均气压	-0.392^a	0.457^a	0.330^a	0.487^a	-0.579^a	0.470^a	1.000
平均温度	0.556^a	-0.708^a	-0.511^a	-0.769^a	0.870^a	-0.697^a	-0.763^a	1.000
相对湿度	-0.594^a	0.377^a	0.169^a	0.497^a	-0.806^a	0.423^a	0.564^a	0.797^a	1.000
平均风速	0.363^a	-0.610^a	-0.422^a	-0.625^a	0.649^a	-0.584^a	-0.603^a	0.688^a	-0.559^a	1.000
日照时数	0.379^a	-0.159^a	-0.149^a	-0.316^a	0.633^a	-0.307^a	-0.350^a	0.535^a	-0.723^a	0.356^a	1.000