Table 4.

Descriptive and logistic regression analysis regarding secondary outcome variables. Values of odds ratios are presented as crude estimates as well as after adjustment

Secondary outcome variables	p-value			Crude OR	95% CI	Adjusted OR	95% CI
Total number of caesarean deliveries a	(p < 0.01)	No	Yes
BMI < 25		1047 (84.0%)	199 (16.0%)	1		1
BMI 25–29.9		258 (73.7%)	92 (26.3%)	1.88	[1.42–2.49]	1.62	[1.18–2.22]
BMI ≥ 30		141 (69.5%)	62 (30.5%)	2.31	[1.66–3.23]	1.76	[1.20–2.58]
Caesarean prior to onset of active labor a	(p < 0.01)	No	Yes
BMI < 25		22 (1.8%)	1211 (98.2%)	1		1
BMI 25–29.9		19 (5.4%)	331 (94.6%)	1.99	[1.12–3.52]	1.64	[0.90–2.98]
BMI ≥ 30		18 (8.9%)	185 (91.1%)	3.37	[1.87–6.07]	2.75	[1.47–5.16]
Reached 2nd stage of labour a	(p < 0.01)	No	Yes
BMI < 25		134 (10.8%)	1112 (89.2%)	1		1
BMI 25–29.9		66 (18.9%)	284 (81.1%)	1.85	[1.38–2.48]	0.61	[0.45–0.84]
BMI ≥ 30		48 (23.6%)	155 (76.4%)	2.13	[1.50–3.03]	0.59	[0.40–0.85]
Vacuum delivery b	(p = 0.39)	No	Yes
BMI < 25		1068 (85.7%)	178 (14.3%)	1		1
BMI 25–29.9		304 (86.9%)	46 (13.1%)	0.91	[0.64–1.27]	0.83	[0.58–1.18]
BMI ≥ 30		181 (89.2%)	22 (10.8%)	0.73	[0.46–1.17]	0.65	[0.40–1.06]
Post-partum haemorrhage ≥ 1000 mL c	(p = 0.02)	No	Yes
BMI < 25		1176 (89.1%)	70 (10.9%)	1		1
BMI 25–29.9		325 (92.9%)	25 (7.1%)	1.29	[0.81–2.07]	1.04	[0.64–1.70]
BMI ≥ 30		181 (89.2%)	22 (10.8%)	2.04	[1.23–3.38]	1.54	[0.90–2.61]
Arterial cord pH < 7.05 d	(p = 0.04)	No	Yes
BMI < 25		1128 (98.4%)	18 (1.6%)	1
BMI 25–29.9		323 (97.9%)	7 (2.1%)	1.36	[0.56–3.28]
BMI ≥ 30		187 (95.7%)	8 (4.3%)	2.85	[1.22–6.65]

^aAdjustments made for: Age, height, birthweight, labour induction, epidural analgesia and use of oxytocin during labour

^bAdjustments made for: Age and use of oxytocin during labour

^cAdjustments made for: Birthweight, epidural analgesia and caesarean delivery

^dNo Adjustments were made