3. The differences was not statistically significant between the cases and the controls on GSTP1 genotypes after stratified by smoking index (SI): STh0, x2=0.22, P0. 898; S1<40, x2=0.95, P0.621; I≥40, x2=2.76, P=0.251.
3．不同吸烟指数uI）的GSTPI基因型的比较，病例组和对照 组间未见统计学的差异：SI＝0组，X‘二0．22，P二0．898；51＜40组， X‘二0．95，P＝0．621；SI＞40组，X‘二2．76，P二0．251。
参考来源 - 谷胱苷肽硫转移酶P1基因多态性与肺癌易感性的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Results the smoking index of case group is higher than the control group.
结果病例组吸烟指数明显高于对照组。
Smoking index of more than 400 people, that is at high risk of lung cancer.
吸烟指数超过400的人，即是肺癌高危人群。
If you smoke 30 a day, for 15 years, smoking history, smoking index was 450.
如果每天吸30支，已有15年的吸烟史，吸烟指数就是450。
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