Table 1 Demographic and clinical characteristics of the PE and control groups

Maternal ages

30.24 ± 3.90

30.14 ± 3.53

0.472

0.637

Times of gravidity

2.22 ± 1.28

2.23 ± 1.19

−0.161

0.872

Gestational ages

35.22 ± 3.49

39.17 ± 1.38

−34.28

< 0.01

Number of abortion

1.42 ± 0.71

1.55 ± 0.85

−2.493

< 0.001

Birth weight of offspring

2.61 ± 0.92

3.40 ± 0.38

−24.479

< 0.001

Systolic blood pressure(mmHg)

161.01 ± 18.7

114.87 ± 9.95

−72.03

< 0.001

Diastolic blood pressure(mmHg)

104.63 ± 13.73

73.51 ± 7.72

−65.52

< 0.001