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<0.05;
**P<0.01;
***P<0.001.
Model 1: Adjusted for birth year, conscription age and conscription centre.
Model 2: Additionally adjusted for maternal age, fatheŕs and motheŕs social position and education.