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目的应用圆形分布法分析桐乡市手足口病季节性分布特点,为手足口病防制工作提供依据。方法从中国疾病预防控制信息系统导出2012—2016年现住址为桐乡市的手足口病病例资料,分1—8月、9—12月2个时段采用圆形分布法计算手足口病的发病高峰。结果 2012—2016年桐乡市手足口病报告发病率分别为176.75/10万、101.38/10万、201.02/10万、158.25/10万和196.23/10万。累计报告6 667例,5—7月发病例数占47.53%。集中度为0.306,提示有一定的季节性。圆形分布结果显示:1—8月,r=0.488 5,α=182.25°(P<0.001),发病高峰日为5月3日,高峰期为3月17日—6月19日;9—12月,r=0.099 8,α=180.36°(P<0.001),发病高峰日为10月30日,高峰期为10月3日—11月28日。结论 2012—2016年桐乡市手足口病呈季节性流行,存在两个发病高峰,主高峰较高,峰值时间为5月3日;次高峰较低,峰值时间为10月30日。
Objective To analyze the seasonal distribution characteristics of hand-foot-mouth disease in Tongxiang City by circular distribution method, and provide evidence for prevention of hand-foot-mouth disease. Methods The data of hand-foot-mouth disease in Tongxiang City from 2012 to 2016 were derived from China CDC. The distribution of hand-foot-mouth disease was calculated by circular distribution in January-August and September-December. . Results The reported rates of hand-foot-mouth disease in Tongxiang City from 2012 to 2016 were 176.75 / 100000, 101.38 / 100000, 201.02 / 100000, 158.25 / 100000 and 196.23 / 100000 respectively. A total of 6667 cases were reported, accounting for 47.53% of cases in May-July. Concentration of 0.306, suggesting a certain seasonal. The results of circular distribution showed that in the first eight months, r = 0.488 5, and a = 182.25 ° (P <0.001). The peak incidence was May 3 and the peak was from March 17 to June 19. The distribution of 9- In December, r = 0.099 8, α = 180.36 ° (P <0.001). The peak incidence was on October 30 and the peak was on October 3 to November 28. Conclusion Hand-foot-mouth disease was seasonal epidemic in Tongxiang City from 2012 to 2016. There were two peak incidences and the main peak was high. The peak time was May 3; the next peak was low and the peak time was October 30.