OCCUPATION AND HEALTH ›› 2026, Vol. 42 ›› Issue (4): 496-500.

• Treatise • Previous Articles     Next Articles

Epidemiological characteristics and trend prediction of hepatitis C in Tengchong City from 2005 to 2023

WU Jincong, XI Rong, CAI Wenbin(), YANG Kaifen, LI Chengsheng, ZHAO Zhen   

  1. Tengchong Center for Disease Control and Prevention,Tengchong,Yunnan 679100,China
  • Received:2025-05-18 Revised:2025-05-26 Online:2026-02-15 Published:2026-02-13
  • Contact: CAI Wenbin,E-mail:tcjkcwb@163.com

Abstract:

Objective To analyze the epidemiological characteristics of hepatitis C in Tengchong City,provide the data reference for the formulation of hepatitis C prevention and control measures. Methods The describe epidemiological method was used to analyze the epidemiological characteristics of the reported hepatitis C cases in Tengchong City from 2005 to 2023,and the exponential smoothing method was used to establish a model to predict the incidence trend of hepatitis C in Tengchong City from 2024 to 2026. Results From 2005 to 2023,3 408 new cases of hepatitis C were reported in Tengchong City,with an average annual incidence rate of 27.55/100 000 and an average annual growth rate of 22.36%. The highest incidence rate in 2012 was 46.13/100 000,and there was statistically significant difference in incidence among different years(χ2trend=174.336,P<0.01),presenting the overall upward trend. There were 35 deaths,with a case fatality rate of 1.03% and an average annual mortality rate of 0.28/100 000. A total of 2 147 confirmed cases were reported,accounting for 63.0%. The cases were reported in every month and every year,the concentration was M=0.056,and the seasonal characteristics were not obvious. The male-to-female ratio was 1.683:1,and the average annual incidence rate of males was higher than that of females(χ2=160.584,P<0.01). A total of 2 273 cases were reported in the 30-<60 years old group,accounting for 66.70%,and the difference in age composition ratio among different years was statistically significant(χ2trend=155.521,P<0.01). The occupation was mainly farmers,with 2 728 cases reported,accounting for 77.79%. The average annual reported incidence rates of Diantan Town,Houqiao Town,Mingguang Town,and Tengyue Street ranked among the top four,which were 145.16/100 000,100.07/100 000,38.47/100 000 and 38.47/100 000,and the difference in the average annual incidence rate among different township was statistically significant(χ2=267.942,P<0.01). The predicted incidence rates from 2024 to 2026 will be 30.67/100 000,31.35/100 000,and 32.54/100 000,respectively,which is higher than that in 2023. Conclusions From 2005 to 2023,the hepatitis C epidemic in Tengchong City shows an overall upward trend. According to the epidemiological characteristics and predictions,publicity and intervention should be strengthened for key populations in key areas,and new modes of prevention and control should be actively explored,so as to achieve the goal of eliminating the public health hazards of hepatitis C.

Key words: Viral hepatitis C, Epidemiological characteristics, Incidence rate, Exponential smoothing method, Trend forecasting

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