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Table 1 Comparison of maternal obstetric and demographic characteristics of the group with PE and the group without PE

From: Assessment of β-human-derived chorionic gonadotrophic hormone (βhCG) and pregnancy-associated plasma protein A (PAPP-A) levels as predictive factors of preeclampsia in the first trimester among Iranian women: a cohort study

Variables

Group

P value

without PE n = 4209

With PE n = 333

Average mother’s age (year)

29.89 ± 5.29

28.32 ± 4.97

0.001

Average spouse’s age (year)

33.62 ± 5.57

32.56 ± 4.89

0.001

Average mother’s BMI (kg/m2)

26.14 ± 5.19

24.38 ± 3.94

0.001

Average number of pregnancies

2.03 ± 1.08

1.83 ± 0.90

0.001

Average number of deliveries

0.67 ± 0.82

0.62 ± 0.74

0.17

Mean gestational age at abortion (week) in previous pregnancies

9.03 ± 4.02

9.01 ± 3.55

0.96

NT (cm)

1.43 ± 0.37

1.39 ± 0.37

0.03

Gestational age during NT ultrasound (day)

87.18 ± 3.91

86.71 ± 3.83

0.03

Weight gain during pregnancy (kg)

12.47 ± 3.56

12.57 ± 3.61

0.6

Abortion history

89 (26.7%)

760 (18%)

0.001

Intrauterine death history

7(%0.2)

30(%0.7)

0.01

History of Type 1 diabetes mellitus

12 (3.6%)

58 (1.3%)

0.004

Gestational diabetes

39(%11.7)

329(%7.8)

0.01

Passive smoking exposure

14 (4.2%)

43 (1%)

0.01

Chronic hypertension

4 (1.2%)

14 (3%)

0.03