Table 3.

Proportion and odds ratio (OR) with 95% confidence interval (CI) for mothers who did not initiate exclusive breastfeeding (EBF) at discharge (n = 1193).

	Mothers who did not initiate EBF at discharge	Logistic regression models				P-value
Crude OR (95% CI)	Multivariate stepwise models⁎
Adjusted OR	95% CI
n (%)	Lower	Upper
Individual
Maternal age, years
< 35	74 (11.5)	1.00	1.00
≥ 35	103 (18.7)	1.76 (1.27, 2.43)	1.99	1.42	2.78	< 0.001
Parity
Multiparous	49 (10.3)	1.00	1.00
Primiparous	128 (17.9)	1.90 (1.34, 2.70)	2.20	1.53	3.16	< 0.001
Combined
Group A (n = 284)
≥ 35, primiparous	64 (22.5)	5.79 (2.89, 11.58)	5.91	2.95	11.86	< 0.001
Group B (n = 268)
≥ 35, multiparous	39 (14.6)	3.39 (1.65, 6.96)	3.38	1.64	6.96	0.001
Group C (n = 429)
< 35, primiparous	64 (14.8)	3.46 (1.74, 6.89)	3.54	1.78	7.07	< 0.001
Group D (n = 208)
< 35, multiparous	10 (4.8)	1.00	1.00

^⁎Individual or combined risks of maternal age and parity were computed adjusted for pre-pregnancy BMI, and cigarette smoking.