Table 3.

Associations between vitamin D deficiency and emergency caesarean section

	Without epidural anesthesia			With epidural anesthesia
	OR	95% CI	P	OR	95% CI	P
Vitamin D status
25OHD ≥ 30 nmol/L (ref)
25OHD < 30 nmol/L	2.038	1.010–4.110	0.047	0.462	0.123–1.734	0.252
Obesity
No (ref)
Yes	0.817	0.366–1.823	0.621	0.675	0.316–1.441	0.309
Birth history
No previous delivery (ref)
Previous vaginal delivery	0.231	0.127–0.423	< 0.001	0.312	0.132–0.734	0.008
Previous delivery by cesarean	1.592	0.805–3.146	0.181	4.419	2.100–9.299	< 0.001
Season at sampling
May-Oct (ref)
Nov-Apr	0.853	0.514–1.416	0.538	1.801	1.020–3.179	0.042
Age (years)	1.080	1.023–1.141	0.006	1.072	1.008–1.139	0.026
Maternal height (cm)	0.960	0.925–0.997	0.033	0.942	0.901–0.985	0.009

CI confidence interval, OR odds ratio, BMI body mass index, T3 third trimester, 25OHD 25-hydroxyvitamin D