P307-2 1.不分层计算结果如下 Chi-Square Tests alue 2-sided) 2-sided) 1-sided 80989 Continuity Corectiona80320 000 Likelihood ratio 82.761 Fis hers Exact Test Linear-by-Linear Associ ation 80988 000 N of valid cases 330372 a Computed only for a 2 2 table b 0 cells(0%)have expected count less than 5. The minim um expected count is 357 Ris k Estimate nterval Value Odds ratio for石棉(1/2) 2013 2351 For cohort癌死亡=1 2.010 1.721 2347 For cohort崩瘾死亡=2 999 998 Nof valid Cases 330372 计算得:x2=80.98,P<0.001; 相对危险度RR=2010,95%置信区间为(1.721,2.347) 因此认为石棉工人肺癌死亡率高于非石棉工人,是非石棉工人的2.01倍 2.分层后计算结果如下:P307-2 ⒈ 不分层计算结果如下： Chi-Square Tests 80.989b 1 .000 80.320 1 .000 82.761 1 .000 .000 .000 80.988 1 .000 330372 Pearson Chi-Square Continuity Correctiona Likelihood Ratio Fisher's Exact Test Linear-by-Linear Association N of Valid Cases Value df Asymp. Sig. (2-sided) Exact Sig. (2-sided) Exact Sig. (1-sided) a. Computed only for a 2x2 table 0 cells (.0%) have expected count less than 5. The minimum expected count is 357. 85. b. Risk Estimate 2.013 1.723 2.351 2.010 1.721 2.347 .999 .998 .999 330372 Odds Ratio for 石棉 (1 / 2) For cohort 肺癌死亡 = 1 For cohort 肺癌死亡 = 2 N of Valid Cases Value Lower Upper 95% Confidence Interval 计算得： 2  =80.98，P＜0.001； 相对危险度 RR ˆ =2.010，95%置信区间为（1.721，2.347）。 因此认为石棉工人肺癌死亡率高于非石棉工人，是非石棉工人的2.01倍。 ⒉ 分层后计算结果如下：