Baseline characteristics according to weight status.

Weight status as determined by Body Mass Index (BMI ≥30);
acomparison between obese and non-obese based on chi-square test;
bcomparison between obese and non-obese based t-test,
cnumber of diseases weighted by severity;
dvisual analogue scale.

以身体质量指数（Body Mass Index，BMI）≥30判定的体重状态；
a. 基于卡方检验（chi-square test）的肥胖组与非肥胖组对比分析；
b. 基于t检验（t-test）的肥胖组与非肥胖组对比分析；
c. 经严重程度加权的疾病计数；
d. 视觉模拟评分法（visual analogue scale）。