Comparison of demographic characteristics between the control group and the colorectal cancer group before and after propensity score matching.

Normality was tested by the Kolmogorov-Smirnov test. Data are the mean± standard deviation or percentage. aP - values were derived from an independent-sample t-test for continuous data, and Chi-square test was performed for categorical data. bP - values were derived from a paired t-test for parametric data or the McNemar test for categorical data. Abbreviation: BMI, body mass index. Comparison of demographic characteristics between the control group and the colorectal cancer group before and after propensity score matching.