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本文对河南省卫辉市27年的流行性乙型脑炎发病季节进行了圆形统计分析,并试将此方法作了一些改进,以便于统计分析。本资料被分为三个阶段,结果表明各阶段(1959～1967,1969～1977,1978～1986年)均呈现明显的季节性发病特点,并进一步求出了较为确切的发病高峰日期,三阶段分别为8月29日,8月20日,8月18日。三阶段发病高峰日期的比较,其差异在统计学上有显著性意义(P<0.01),提示近年来乙脑发病高峰日期有提前趋势。本方法求出了较为确切的发发病高峰日期,为本病的预防工作提供了有一定参考价值的数据。
In this paper, a circular statistical analysis is made on the incidence of Japanese encephalitis in the past 27 years in Weihui City, Henan Province. Some improvements of this method are made for statistical analysis. The data is divided into three stages, the results showed that all stages (1959 ~ 1967, 1969 ~ 1977, 1978 ~ 1986) showed a seasonal seasonal disease characteristics and further to determine the exact peak of the onset date, the three stages Respectively, August 29, August 20, August 18. The difference of the three peak incidence dates was statistically significant (P <0.01), suggesting that the peak date of JE incidence in recent years had an early trend. The method of determining the exact onset of the peak date for the prevention of this disease provides a certain reference value of the data.