Table 2 Vitamin D, ionised calcium, type of delivery and gestational outcomes

Mode of delivery

 Spontaneous vaginal delivery

57.6 (332)

76.8 (448)

 Caesarean section

36.6 (211)

23.0 (134)

0.63 [0.52—0.75]

 < 0.001

 Induced labour (Misoprostol)

5.7 (33)

0.2 (1)

0.025 [0.003–0.18]

 < 0.001

Preeclampsia

5.7 (33)

2.1 (12)

0.36 [0.19—0.69]

0.001

Preterm birth

9.5 (55)

4.8 (28)

0.50 [0.32–0.78]

0.002

Measurement of 25(OH)D^a

41.47 ± 20.3

37.25 ± 9.4

-

0.000

Ionised calcium^a

1.17 ± 0.19

1.17 ± 0.15

-

0.532