Table 4.

Proportion and odds ratio (OR) with 95% confidence interval (CI) for mothers who did not initiate exclusive breastfeeding (EBF) at 1 month (n = 1193)

	Mothers who did not initiate EBF at 1-month	Logistic regression models
Crude OR (95% CI)	Multivariate stepwise models⁎
Adjusted OR	95% CI		P-value
n (%)	Lower	Upper
Individual
Maternal age, years
< 35	148 (23.1)	1.00	1.00	–	–
≥ 35	158 (28.6)	1.34 (1.03, 1.73)	1.42	1.08	1.86	0.011
Parity
Multiparous	108 (22.6)	1.00	1.00	–	–
Primiparous	198 (27.7)	1.31 (1.00, 1.71)	1.47	1.11	1.95	0.008
Combined
Group A (n = 284)
≥ 35, primiparous	64 (22.5)	2.05 (1.33, 3.17)	2.20	1.41	3.44	0.001
Group B (n = 268)
≥ 35, multiparous	39 (14.6)	1.68 (1.07, 2.62)	1.72	1.09	2.70	0.019
Group C (n = 429)
< 35, primiparous	64 (14.8)	1.61 (1.06, 2.44)	1.73	1.13	2.64	0.011
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 maternal underlying disease and gestational week at delivery.