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Stepwise Regression for the Prediction of Maternal Obstetric Risks (N=200)*
| Criterion and Predictor | R2 | R2 Change | F Change |
|---|---|---|---|
| Gravidity | |||
| Age | .17 | .17 | 40.2 |
| Cocaine | .25 | .08 | 33.4 |
| Abortions | |||
| Ago and gravidity | .63 | .63 | 210.1 |
| Cocaine | .64 | .01 | 114.1 |
| Prenatal care | |||
| Gestational age | .09 | .09 | 18.9 |
| Cocaine | .15 | .06 | 16.8 |
P<.001.
