Table 1.

Characteristics of pregnant women who completed the study and those lost to follow-up.

Characteristic	Completed the study (n = 518)	Lost to follow-up (n = 109)	p-value
Age, years)	26.1 (5.8)	26.2 (5.8)	0.834
Pre-pregnancy body mass index, Kg/m2	26.0 (5.1)	25.5 (4.9)	0.211
Gestation age at entry, weeks	13.5 (1.1)	13.6 (1.1)	0.627
Number (%) with ≥2 prior births	208 (40.1%)	66 (39.8%)	0.891
Educational attainment, years	11.3 (2.1)	11.4 (2.1)	0.723

All data are shown as a mean (SD) unless otherwise specified.