Table 1 Characteristics of the study subjects.

N

102

176

Age (years)

30.64 ± 6.32

29.60 ± 5.18

0.14

Delivery weeks

35.41 ± 3.43

38.58 ± 2.14

<0.01

Birth weight (g)

2266.5 ± 839

3078.0 ± 572

<0.01

First parity

74 (72.5%)

78 (44.3%)

<0.01

Systolic BP

161.66 ± 10.3

115.84 ± 10.9

<0.01

Diastolic BP

92.70 ± 8.47

70.40 ± 7.54

<0.01

Smoking before/

during pregnancy

30 (29.4%)/

6 (5.9%)

62 (35.2%)/

16 (9.1%)

0.32/

0.34

Twin pregnancies

8 (7.8%)

3 (1.7%)

0.01