Table 2 Characteristics of pregnant women with SCH who did or did not receive treatment and control subjects

Age (years)

31.84(3.83)

30(28–33)

30(28–33)

0.014

BMI (kg/m²)

22.70(3.77)

21.56(19.61–24.01)

21.48(19.83–23.44)

0.115

TSH (mIU/L)

4.56(4.22–5.22)

4.75(4.33–5.59)

1.34(0.96–1.79)

 < 0.001

FT4 (pmol/L)

14.73(1.43)

14.76(1.47)

15.92(14.77–16.91)

 < 0.001

GA at delivery (wks)

39 (38–40)

38 (38–40)

39 (38–40)

0.695

Neonatal weight (g)

3349.08(399.47)

3307.07(483.43)

3350 (3085–3620)

0.249

History of adverse pregnancy outcomes, n (%)

3 (2.91)

3 (0.94)

159(1.66)

0.294

History of hypertension, n (%)

1 (0.97)

3(0.94)

40(0.42)

0.532

History of diabetes, n (%)

0

0

31 (0.32)

Cesarean section rate, n (%)

41 (39.81)

117(36.68)

3374(35.15)

0.154