Regression coefficients for the effect of birth order on CVD risk factors with first-born as reference category.

B: Unstandardized regression coefficient; BMI, body mass index; DBP, diastolic blood pressure; SBP, systolic blood pressure; C, 95% confidence interval.*P**P***PModel 1: Adjusted for birth year, conscription age and conscription centre.Model 2: Additionally adjusted for maternal age, fatheŕs and motheŕs social position and education.B：未标准化回归系数（Unstandardized regression coefficient）；BMI：身体质量指数（body mass index）；DBP：舒张压（diastolic blood pressure）；SBP：收缩压（systolic blood pressure）；C：95%置信区间（95% confidence interval）。*P**P***P 模型1：校正出生年份、应征年龄及征兵机构。 模型2：额外校正母亲年龄、父母双方的社会地位与受教育程度。