Table 3.

Adjusted prevalence ratio for exclusive breastfeeding and respective p according to characteristics of the mother, of the birth, of the baby and health care received by the baby, for babies under six months. Barra Mansa, RJ, Southeastern Brazil, 2006.

		Model 1		Model 2		Model 3		Final model
		PRa	p	PRa	p	PRa	p	PRa	p	95%CI
Mother’s schooling
	Completed primary school	0.841	0.036	0.798	0.009	0.807	0.006	0.798	0.004	0.684;0.931
	Completed high school and over	1		1		1		1
Paid work
	Yes	0.821	0.096	–	–	–	–	–	–	–
	No	1
Born in the Baby-Friendly hospital
	No			0.828	0.187	–	–	–	–	–
	Yes			1
Type of delivery
	Cesarean			0.779	0.004	0.832	0.018	0.838	0.023	0.719;0.976
	Vaginal			1		1		1
Birth weight (g)
	< 2,500			0.760	0.125	–	–	–	–	–
	≥ 2,500			1
Sex
	Female			0.891	0.154	–	–	–	–	–
	Male			1
Baby’s age
	Age in days					0.992	< 0.001	0.992	< 0.001	0.991;0.994
Vaccination center
	Rural					0.637	0.086	–	–	–
	Urban					1
Use of pacifier
	Yes					0.589	< 0.001	0.589	< 0.001	0.495;0.701
	No					1		1
Monitored in a Breastfeeding-Friendly Primary Health Care Center
	Yes					1.204	0.020	1.193	0.027	1.020;1.395
	No					1		1

PR_a: Adjusted prevalence ratio