Table 4. Estimation of bivariate linear regression parameters* between birth weight and maternal variables in cohort of pregnant women. Petropolis and Queimados, RJ, Southeastern Brazil, 2007-2008.
| Variable | β | p |
|---|---|---|
| Social class | ||
| E + D | 0.00 | – |
| C + B | 70.93 | 0.007 |
| Per capita household income | 0.17 | 0.005* |
| Race | ||
| White | 0.00 | – |
| Mixed race | -31.61 | 0.281 |
| Black | -14.44 | 0.563 |
| Age (years) | 5.00 | 0.014 |
| Education level (years) | 9.92 | 0.021 |
| Marital status | ||
| Partner | 0.00 | – |
| No partner | -76.48 | 0.006 |
| Paid job | ||
| No | 0.00 | – |
| Yes | 4.22 | 0.867 |
| Parity | ||
| Primipara | -58.76 | 0.018 |
| 2 to 3 | 0.00 | – |
| 4 or more | -11.34 | 0.758 |
| Pregestational nutritional status | ||
| Low weight | -46.93 | 0.318 |
| Eutrophic | 0.00 | |
| Overweight | 122.40 | < 0.001 |
| Obese | 221.34 | < 0.001 |
| Adequacy of gestational weight gain | ||
| Insufficient | -77.41 | < 0.001 |
| Adequate | 0.00 | |
| Excess | 144.29 | 0.017 |
| Adequacy of prenatal care | ||
| More than adequate | 71.49 | 0.005 |
| Adequate | 0.00 | – |
| Inadequate | -51.64 | 0.063 |
| Gestational hypertension | ||
| No | 0.00 | – |
| Yes | 36.08 | 0.253 |
| Gestational diabetes mellitus | ||
| No | 0.00 | – |
| Yes | 47.23 | 0.559 |
| Prior history of perinatal death, LBW or PMT | ||
| No | 0.00 | – |
| Yes | -67.52 | 0.159 |
| Smoking | ||
| No | 0.00 | – |
| Yes | -133.71 | < 0.001 |
| Delivery type | ||
| Vaginal | 0.00 | – |
| Cesarian section | 149.76 | < 0.001 |
| Baby’s sex | ||
| Male | 0.00 | – |
| Female | -111.39 | < 0.001 |
β: linear regression coefficient; LBW: low birth weight; PMT: prematurity
*
Birth weight as dependent variable and other independent variables.