Table 3: Women who did not initiate breastfeeding in the first birth: unadjusted and adjusted analyses showing associations between factors in first and second births and odds of initiating breast feeding in the second birth

Factor	Birth 1	Birth 2	Unadjusted OR (95% CI)	Adjusted OR* (95% CI)
Smoking	No	No	1.00	1.00
	No	Yes	0.11 (0.69-1.80)	1.13 (0.70-1.84)
	Yes	No	0.96 (0.64-1.42)	0.98 (0.66-1.47)
	Yes	Yes	0.70 (0.56-0.88)	0.71 (0.57-0.90)
Infant length of stay < 72 h	Yes	Yes	1.00	1.00
	Yes	No	1.87 (1.34-2.59)	2.12 (1.48-3.03)
	No	Yes	1.39 (1.05-1.84)	1.49 (1.10-2.00)
	No	No	1.95 (1.39-2.70)	2.30 (1.58-3.35)
Birth year	-	2012-2013	1.00	1.00
	-	2007-2009	0.33 (0.25-0.44)	0.55 (0.42-0.73)
	-	2010-2011	0.42 (0.33-0.54)	0.69 (0.54-0.87)
Cesarean delivery	No	No	1.00	1.00
	No	Yes	1.43 (0.92-2.20)	1.49 (0.87-2.55)
	Yes	No	1.81 (1.07-3.03)	1.02 (0.64-1.63)
	Yes	Yes	0.96 (0.78-1.32)	0.67 (0.49-0.91)

Note: CI = confidence interval, OR = odds ratio.

*Adjusted for other factors in table; both adjusted and unadjusted analyses include only observations with nonmissing values for each factor.