Table 4. Association between the mode of delivery and neonatal outcomes according to the evolution of BMI in the Atalah classification during prenatal care.

Outcomes	All Sample				Women with adequate BMI in the first prenatal visit				Women with overweight BMI in the last prenatal visit
	Stag	Incr	OR (CI 95%)*		Stag	Incr	OR (CI 95%)*		Stag	Incr	OR (CI 95%)*
	n	n			n	n			n	n
Mode of delivery
Vaginal	333	81	Ref		148	43	Ref		82	19	Ref
C-section	448	140	1.28	(0.94–1.75)	117	67	1.97	(1.25–3.10)	104	55	2.28	(1.26–4.14)
Gestational age at birth
≥ 37	741	209	ref		313	106	Ref		179	71	Ref
< 37	41	12	1.04	(0.54–2.01)	12	4	0.98	(0.31–3.12)	8	3	0.95	(0.24–3.67)
Newborn weight (g)
< 2,500	49	11	0.84	(0.43–1.64)	16	5	1.00	(0.36–2.82)	10	3	0.84	(0.22–3.14)
2500–3999	702	188	Ref		299	93	Ref		170	61	Ref
≥ 4000	49	18	1.37	(0.78–2.41)	7	9	4.13	(1.50–11.40)	2	9	12.54	(2.64–59.67)
Somatic neonatal age (weeks)
≥ 37	704	200	Ref		303	103	Ref		165	67	Ref
< 37	43	14	1.15	(0.61–2.14)	10	3	0.88	(0.24–3.27)	12	6	1.23	(0.44–3.42)
APGAR 1st minute
≥ 7	728	206	Ref		307	101	Ref		172	68	Ref
< 7	37	12	1.15	(0.59–2.24)	10	7	2.13	(0.79–5.74)	11	5	1.15	(0.39–3.43)
APGAR 5th minute
≥ 7	779	221	Ref		323	110	Ref		155	74	Ref
< 7	1	0	1.17	(0.05–28.90)	2	0	0.59	(0.03–12.29)	1	0	0.70	(0.03–17.28)
Newborn weight adequacy
SGA	74	14	0.69	(0.38–1.25)	56	9	0.49	(0.20–2.77)	8	5	1.84	(0.58–5.86)
AGA	670	184	Ref		385	126	Ref		171	58	Ref
LGA	24	19	2.88	(1.55–5.38)	9	9	3.06	(1.19–7.87)	3	10	9.83	(2.61–36.94)

Abbreviations: AGA, adequate for gestational age; CI, confidence interval; Incr, increased; LGA, large for gestational age; OR, odds ratio; ref, reference level; SGA, small for gestational age; Stag, stagnant.