Table 2.
Marginal probability effects of the prenatal care use indicators on low birth weight (LBW) and preterm birth
| Model | Group without birth defects | Group with birth defects |
|---|---|---|
| ME (SE) | ME (SE) | |
| LBW (birth weight <2500 grams) | ||
| Prenatal care delay: | ||
| Unadjusted | 0.0005 (0.0009) | 0.0006 (0.0013) |
| Adjusted | 0.0002 (0.0009) | 0.0012 (0.0014) |
| Prenatal care visits: | ||
| Unadjusted | −0.0098*** (0.0028) | −0.0096*** (0.0036) |
| Adjusted | −0.0131*** (0.0027) | −0.0155*** (0.0039) |
| Inadequate care: | ||
| Unadjusted | 0.0506** (0.025) | 0.0413 (0.031) |
| Adjusted | 0.0591** (0.0255) | 0.0533 (0.0325) |
| Adequate care: | ||
| Unadjusted | 0.0043 (0.0183) | 0.0667** (0.026) |
| Adjusted | −0.0091 (0.0166) | 0.0579** (0.0267) |
| Preterm birth (gestation <37 weeks) | ||
| Prenatal care delay: | ||
| Unadjusted | 0.0021* (0.0011) | 0.0011 (0.0013) |
| Adjusted | 0.0028** (0.0011) | 0.0007 (0.0014) |
Notes: Marginal effects (ME) of the prenatal care use indicators on outcome probabilities were estimated holding model covariates at their means. Standard errors (SE) of marginal effects are listed in parentheses. ME were estimated alternatively as unadjusted and adjusted for model covariates.
*, ** and *** indicate significant effects at P < 0.1, P < 0.05 and P < 0.01, respectively.