The distributions of selected variables among cases and control subjects.
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aIndependent-samples T-test for comparing the mean of the age, BMI and Pack-years of smoking between the cases and controls.bTwo-sided chi-squared test for either selected variable distributions between cases and controls.*p
a. 采用独立样本t检验（Independent-samples T-test）比较病例组与对照组在年龄、身体质量指数（Body Mass Index, BMI）以及吸烟包年数三项指标上的均值差异。 b. 针对病例组与对照组间各选定变量的分布特征，采用双侧卡方检验（Two-sided chi-squared test）进行组间比较。*p
创建时间：
2015-12-02
