Long Term Mortality.

BMI: body mass index; Multivariable Cox regression model was used to analyze categorical variables. β: std: standard deviation; HR: hazard ratio; CI: confidence interval. P values: comparison between the other and normal weight group; P身体质量指数（BMI，body mass index）：本研究采用多变量Cox回归模型（Multivariable Cox regression model）分析分类变量。β值：SD（标准差，standard deviation）；HR（风险比，hazard ratio）；CI（置信区间，confidence interval）。P值：其余组与正常体重组间的比较；P