Table 4.

Maternal Factors Predicting Low Birth Weight by Logistic Regression

OR95% CI
Age <20 y (yes = 1)1.321.24–1.40
Marital status (unmarried = 1)1.061.01–1.12
Education (<high school = 1)1.101.05–1.16
Employment (unemployed = 1)1.020.93–1.10
Insurance (no insurance = 1)1.030.99–1.07
Neighborhood income*
 Middle0.930.89–0.98
 High0.900.86–0.95
Trimester in which prenatal care  began (1st as reference)
 2nd and 3rd0.960.91–1.01
 No prenatal care1.251.13–1.38
Alcohol (yes = 1)1.421.26–1.61
Drug abuse (yes = 1)2.492.27–2.71
Cigarette (yes = 1)1.541.42–1.69
Primipara (yes = 1)1.071.00–1.15
Preterm birth (yes = 1)3.263.12–3.41
Birth place (NYC whites as  reference)
 South US1.521.35–1.68
 Northeast US1.301.21–1.40
 Caribbean0.950.87–1.03
 South America1.241.08–1.39
 Africa0.860.69–1.02
Chronic disease (yes = 1)2.101.92–2.27
  • * Low income as reference.