Sociodemographic and clinical characteristics, as well as cigarette smoking habits of 192 UC patients and 381 matched controls.

aOR values were evaluated by using multivariate logistic regression model after adjustment for age and gender. *trend p<0.05.调整后优势比（adjusted Odds Ratio，aOR）值经校正年龄与性别因素后，采用多因素logistic回归模型进行评估。 *趋势检验P值<0.05。