Impact of obesity and other risk factors on labor dystocia in term primiparous women: a case control study

Table 3 Route of delivery according to WHO BMI classes

BMI	Total		CS (291)		VD (299)		univariate			multivariable
BMI	n	%	n	%	n	%	p	OR	95% CI	p	OR	95% CI
< 18.5	22	3.7	5	1.71	17	5.69	0.073	0.39	0.14–1.09	0.791	0.82	0.20–3.44
≥18.5–25	379	64.2	162	55.7	217	72.6		1		0.011	1
≥25–30	113	19.2	67	23.0	46	15.4	0.002	1.95	1.27–2.99	0.262	1.41	0.78–2.55
≥30–35	45	7.6	33	11.3	12	4.01	< 0.001	3.68	1.85–7.35	0.005	3.36	1.44–7.84
≥35	31	5.3	24	8.25	7	2.34	0.001	4.59	1.93–10.9	0.016	3.82	1.29–11.3

8 BMIs were missing
The multivariable p-values and ORs are from logistic regression analyses carried out among the most marked factors affecting delivery route, i.e. BMI class, maternal age, diabetes, chronic disease, induction of labor, chorioamnionitis, fetal malposition, gestational age, birth weight

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