(b)  

	Followup (n = 374)	No followup (n = 785)	P value	Statistical power
Age (yr), mean ± SD	34.5 ± 5.2	33.1 ± 4.8	<0.001	>95.0%
Prepregnancy BMI (kg/m2), mean ± SD	25.9 ± 4.5	25.7 ± 4.7	0.265	67.4%
FPG (mg/dL), mean ± SD	92.8 ± 9.0	91.2 ± 10.7	0.027	>95.0%
Week at diagnosis (n), mean ± SD	25.3 ± 4.9	27.2 ± 3.4	<0.001	>95.0%

Continuous variables were compared using linear regression models adjusted for familial history of type 2 DM, parity, and prepregnancy BMI (when appropriate). Post-hoc statistical power calculations were performed using G∗Power software 3.1, entering partial R-squared obtained with regression for each trait. FPG: fasting plasma glucose; PCOS: polycystic ovary syndrome. All variables have been log-transformed to better approximate a normal distribution.