Table 2.

Incidence of term preeclampsia (%): simulation versus observed rates if women had an adequate gestational weight gain (GWG) in the same population, Crude ORs.

	Non-overweight <25 kg/m² n=35 402	OR 95% CI	P value	Overweight 25–29.9 kg/m² n=12 369	OR 95% CI	P value
ORs: Adequate GWG versus observed rates	66/7456 (0.88%) versus 276/35 402 (0.77%)	0.88	0.17	20/3471 (0.57%) versus 133/12 369 (1.07%)	0.53 (0.32 to 0.84)	0.003
	Obese 30–34.9 kg/m² n=6019	OR 95% CI	P value	Severe obese ≥35 kg/m² n=3913	OR 95% CI	P value
ORs: adequate GWG versus observed rates	8/1134 (0.7%) versus 94/6019 (1.56%)	0.44 (0.20 to 0.88)	0.01	2/233 (0.86%) versus 100/3913 (2.55%)	0.33 (0.04 to 1.2)	0.06