Table 3.

Associations between risk factors and LBW in selected cities in Mato Grosso State, Brazil

Variable	Crude odds ratio (95% CI)	Adjusted odds ratio (95% CI)
Newborn sex
Male	1.00	1.00
Female	1.15 (0.85-1.54)	1.15 (0.86-1.53)
Mother’s level of education
≤7 y	1.00	1.00
≥8 y	1.40 (1.05-1.87)	1.31 (0.97-1.77)
Age group (y)
20–39	1.00	1.00
≤19 and ≥40	1.29 (0.95-1.75)	1.24 (0.91-1.67)
Type of delivery
Normal	1.00	1.00
Cesarean section	1.13 (0.84-1.51)	1.01 (0.65-1.15)
Number of prenatal visits
4+	1.00	1.00
1–3	1.79 (1.17-2.73)	1.67 (1.10-2.53)