Table 1 Baseline characteristics

Age (year)

30.83 ± 5.06

BMI (kg/m²)

21.94 ± 4.14

 1

104 (63.8)

 2

43 (26.4)

  ≥ 3

16 (9.8)

 0

109 (66.8)

 1

50 (30.7)

  ≥ 2

4 (2.5)

Gestational age at enrollment (weeks)

35.62 ± 2.83

 Gestational hypertension

86 (52.8)

 Preeclampsia

77 (47.2)

 Urea nitrogen (mmol/L)

4.36 ± 1.81

 Creatinine (umol/L)

56.17 ± 22.57

 GFR (ml/min/1.73m²)

132.19 ± 44.77

 Albumin (g/L)

32.02 ± 5.65

 Urinary protein (mg/24 h)

211 (75, 820)

 TSH (mIU/L)

3.67 ± 2.21

 FT4 (pmol/L)

11.58 ± 2.15

 Thyroid peroxidase antibody positive (n, %)

6 (3.7)

Birth weight (g)

2862.07 ± 787.48

Birth weight < 2500 g (n, %)

49 (30.1)

Gestational age at delivery (weeks)

37.49 ± 2.88