Table 1:

Characteristics of cases and controls at the time of pregnancy.

Characteristic	Cases 31.1%(n=130)	Controls 68.9%(n=288)	p value
Age, mean years (SD)	26.5 (35.7)	23.9 (7.3)	0.411
Parity ( % primiparous)	88/130 (67.7%)	123/286 (43.0%)	0.001
Mean systolic BP < 20wk gestation (SD)	133.2 (20.3)	122.3 (17.7)	0.001
Mean diastolic BP < 20wk gestation (SD)	79.2 (12.7)	71.7 (11.6)	0.001
Body-Mass index (SD) at first prenatal visit	30.5 (7.09)	28.0 (7.08)	0.001
Gestational diabetes (% yes)	17/129 (13.2%)	12/220 (5.5%)	0.007
Maternal smoking (% yes)	34/87 (39.1%)	85/173 (49.1%)	0.125