Seasonal distribution characteristics of hand-foot-and-mouth disease in Henan Province,2008-2023
Objective To analyze the seasonal distribution of hand-foot-and-mouth disease(HFMD)in Henan Province from 2008 to 2023 and provide evidence-based insights for the prevention and control of HFMD.Methods Reported HFMD case data in Henan from 2008 to 2023 were extracted through the National Notifiable Infections Diseases Reporting System of Chinese Center for Disease Control and Prevention.Monthly case counts were analyzed using concentration method,seasonal index,and circular distribution method to determine the seasonal distribution characteristics.Results A total of 1 106 708 HFMD cases were reported in Henan,with an average annual incidence of 72.79/105.The concentration degree(M)was 0.418.The annual M ranged from 0.281-0.787,indicating a seasonal distribution pattern.The seasonal index(C)from April to July was greater than 100％,peaking in May at 256.795％,indicating the epidemic season of April to July.Circular distribution analysis identified July 1st as the peak date for incidence,with a peak period from April 20 to September 16th(Z=191 100.689,P＜0.001).Conclusions HFMD exhibits distinct seasonal distribution characteristics in Henan.It is recommended that preventive measures should be implemented early in high-incidence season to mitigate the peaks of outbreaks.
Hand-foot-and-mouth diseaseSeasonal characteristicsConcentration methodSeasonal index methodCircular distribution method
NETL
NSTL
万方数据
