Table 3. Logistic bivariate regression analysis between maternal ages and pre-pregnancy BMI.

All PE (all preeclampsia N = 1,736), EOP (N = 574) and LOP (N = 1,162) vs controls, no preeclampsia (N = 71,078).

	All PE aOR	P val	EOP aOR	P val	LOP aOR	P val
Maternal age (increment by 5 years)	1.021 [1.04–1.029]	< 0.001	1.035 [1.021–1.048]	< 0.001	1.015 [1.006–1.024]	< 0.001
BMI (kg/m²) (increment by 5kg/m²)	1.050 [1.043–1.057]	< 0.001	1.039 [1.026–1.053]	< 0.001	1.056 [1.047–1.064]	< 0.001

Women where we could define the pre-pregnancy BMI: N = 965/1162 (83.0%) LOP; N = 456/574 (79.4%) EOP; N = 64,102/71,078 (90.1%) controls.