Table 1 Maternal and neonatal characteristics in normal pregnant women and preeclamptic women

From: Plasma level of hydroxysteroid (17-β) dehydrogenase 1 in the second trimester is an independent risk factor for predicting preeclampsia after adjusting for the effects of mean blood pressure, bilateral notching and plasma level of soluble fms-like tyrosine kinase 1/placental growth factor ratio

Characteristics

Normal pregnant women (n=128)a

All preeclamptic women (n=30)

Numbers of missing values

P-value

Mother

 Age (mean±s.d., years)

32.6±5.4

33.6±5.8

0

0.372

 Age ⩾35 years (%)

43 (34)

13 (43)

0

0.397

 Race: Japanese (%)

127 (99.2)

30 (100)

0

1.000

 Nulliparous women (%)

65 (51)

14 (47)

0

0.840

 Women with past history of PE/GH (%)

8 (6.3)

7 (23)

0

0.010

 Women with family history of hypertension (%)

23 (18)

12 (40)

0

0.014

 Current smoker (%)

7 (5.7)

14 (13)

6

0.229

 Pre-pregnancy BMI (mean±s.d., kg m−2)

22.2±4.1

24.2±4.4

3

0.021

 Obesity (%)

27 (21)

11 (39)

3

0.054

 Chronic hypertension (%)

0 (0.0)

6 (20)

0

<0.001

 MBP at 16–23 weeks of gestation (mean±s.d., mm Hg)

86±10

99±14

0

<0.001

 MBP at 26–31 weeks of gestation (mean±s.d., mm Hg)

84±9

100±14

1

<0.001

 BN at 20–23 weeks of gestation (%)

10 (8.8)

11 (38)

16

<0.001

Infant

 Gestational age at delivery (mean±s.d., weeks)

39.5±1.3

37.2±3.7

0

0.002

 Preterm delivery (%)

5 (3.9)

12 (40)

0

<0.001

 Birthweight (mean±s.d., g)

3001±362

2564±791

0

0.006

 Multiple of median of birthweight (mean±s.d.)b

−0.03±0.11

−0.05±0.16

0

0.474

 Small-for-gestational-age infant (%)c

14 (11)

6 (20)

0

0.220

  1. Abbreviations: BMI, body mass index; BN, bilateral notching; GH, gestational hypertension; MBP, mean blood pressure; PE, preeclampsia.
  2. aNormal pregnant women were defined as women not complicated with PE and GH.
  3. bMultiple of median of birthweight was calculated by the equation of (birthweight–median)/median, where median was defined by standard birth weight table for the Japanese population.
  4. cSmall-for-gestational-age infant was defined as an infant having a birth weight below the 10th percentile for the Japanese population.
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