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首页> 美国政府科技报告 >Statistical Methods of Analyzing the Seasonal Character of Diseases with a Droplet Mode of Infection.
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Statistical Methods of Analyzing the Seasonal Character of Diseases with a Droplet Mode of Infection.

机译：用液滴感染模式分析疾病季节性的统计方法。

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For analyzing the intra-annual distribution of incidence in comparison with a number of years and for various territories, it is expedient to calculate the monthly incidence in indices per 10,000 or 100,000 of population from specific age contingents. A reliable determination of the onset of the period of the seasonal rise in incidence can be obtained by a statistical analysis of the intra-annual distribution of incidence on the basis of evaluating the significance in the difference of indices. For a quantitative evaluation of the development of incidence during the period of the seasonal rise it is possible to use the indices for the average tempo of dynamics of incidence, calculated by the formula of the weighted mean geometric coefficient of increase in incidence, taking into consideration the indices of incidence in each of the months of this period. This same method may be used for the quantitative characteristics of the dynamics of incidence during the period of the seasonal decline. As a criterion for the quantitative characteristics of incidence levels during the period of the seasonal rise, and also decline, in incidence, it is possible to use the intensive indices of incidence during these periods. (Author)

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