Table 3 Maternal outcomes stratified by maternal vitamin D status in the first trimester

Gestational Age (weeks) (Mean±SD)^a

38.9 ± 1.4

38.9 ± 1.4

38.8 ± 1.2

38.9 ± 1.4

3.327

.036^&

Gestational Age(weeks) (Category)

8.023

.431^*

< 28

3

0

0

3

28–31 + 6

54(0.3)

26(0.4)

0

80(0.3)

32–33 + 6

101(0.6)

31(0.4)

4(0.6)

136(0.6)

34–36 + 6

692(4.4)

324(4.6)

32(4.5)

1048(4.5)

≥37

14,846(94.6)

6600(94.5)

681(95.0)

22,127(94.6)

Cesarean section

6715(42.8)

3028(43.4)

301(42.0)

10,044(42.9)

0.969

.616*

Premature rupture of membranes

18(0.1)

12(0.2)

0

30(0.1)

2.185

.335*

Gestational diabetes^a

1680(10.7)

831(11.9)

73(10.2)

2584(11.0)

7.648

.022*

Preeclampsia

440(1.9)

162(2.3)

11(1.5)

613(2.6)

7.832

.020*

Intrahepatic cholestasis

108(0.7)

38(0.5)

8(1.1)

154(0.7)

3.894

.143*

Intrauterine infection

330(2.1)

115(1.6)

10(1.4)

455(1.9)

6.422

.040*

2-h postpartum hemorrhage(ml)

256 ± 149

255 ± 106

244 ± 84

255 ± 137

.001

.797^#