Logistic models of the effect of cigarette smoking on preterm delivery for African American and white women
| Variable | Parameter estimate* | SE | p Value |
|---|---|---|---|
| *Parameter estimates are on the natural log scale, for example, OR=e^(0.057 × cigarettes per day) for cigarette smoking among African Americans. | |||
| African American women, n=346 | |||
| Intercept | 1.67 | 3.23 | 0.61 |
| Cigarettes per day | 0.057 | 0.023 | 0.015 |
| Medi-Cal insurance | 0.20 | 0.26 | 0.45 |
| Parity | 0.073 | 0.10 | 0.49 |
| Maternal height (cm) | −0.013 | 0.020 | 0.53 |
| Non-pregnant weight (kg) | −0.017 | 0.010 | 0.097 |
| White women, n=1153 | |||
| Intercept | 1.14 | 1.86 | 0.54 |
| Cigarettes per day | 0.022 | 0.011 | 0.046 |
| Medi-Cal insurance | 0.34 | 0.19 | 0.072 |
| Parity | −0.0065 | 0.076 | 0.93 |
| Maternal height (cm) | −0.013 | 0.012 | 0.26 |
| Non-pregnant weight (kg) | −0.0098 | 0.0072 | 0.17 |