Table 3.
Logistic Regression for Schizencephaly, Adjusted for Maternal Age (<20 vs ≥20).
| Odds ratio |
95% Wald confidence limits |
P | |
|---|---|---|---|
| Smoking (% smoker) | 1.977 | 0.970–4.027 | .0605 |
| No prenatal care: Began prenatal care first trimester | 13.228 | 6.472–27.036 | <.0001 |
| Began prenatal care second trimester: Began prenatal care first trimester | 2.075 | 0.939–4.582 | .0710 |
| Began prenatal care third trimester: Began prenatal care first trimester | 3.334 | 0.987–11.262 | .0526 |
Note: The control sample was from the 2002 National Vital Statistics Report.