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１∶Ｍ病例－对照研究Ｘ~２、ＯＲ值计算器程序法李在忠在对发病病因分析中，常采用１：Ｍ病例－对照研究法。该法可提高统计分析效率而被广泛应用。笔者采用ＣＡＳＩＯｆｘ－１８０Ｐ系列计算器编程，以极少步数可获得Ｘ２及ＯＲ值，供流行病学调查分析用。１公式与应用?..
1: M case-control study X ~ 2, OR calculator program method Li Zaizhong in the analysis of the etiology, often used 1: M case-control study. The law can be widely used to improve the efficiency of statistical analysis. I use CASIOfx-180P series calculator programming, with very few steps to get X2 and OR values for epidemiological investigation and analysis purposes. 1 Formulas and Applications?