Table 2.
Crude and adjusteda regression coefficients and standard errors for the association between maternal physical activity and birthweight: Newborn Epigenetic Study
| Crude (N = 1281) | Adjusted (N = 1144b) | |
|---|---|---|
| β coefficient, Standard Error, p-value | ||
| Light physical activity (median = 8 hours/day) | ||
| Quartile 1 | Reference | Reference |
| Quartile 2 | 114.34, 46.28, 0.01 | 73.41, 39.90, 0.07 |
| Quartile 3 | 79.13, 48.19, 0.10 | 23.66, 42.04, 0.57 |
| Quartile 4 | 56.49, 47.40, 0.23 | 10.16, 41.43, 0.81 |
| p trend = 0.0678 | ||
| Moderate physical activity (median = 3 hours/day) | ||
| Quartile 1 | Reference | Reference |
| Quartile 2 | −70.86, 47.42, 0.14 | −65.44, 40.64, 0.11 |
| Quartile 3 | −16.87, 50.00, 0.74 | −50.86, 42.91, 0.24 |
| Quartile 4 | −21.87, 48.85, 0.65 | −18.63, 42.54, 0.66 |
| p trend = 0.0773 | ||
| Intense physical activity (median = ½ hour/day) | ||
| None | Reference | Reference |
| ≤ Median | 47.98, 44.23, 0.28 | −17.71, 38.18, 0.64 |
| > Median | 68.15, 49.88, 0.17 | −0.73, 42.79, 0.99 |
| p trend = 0.6428 | ||
| Total non-sedentary time (median = 6.5 hours/day) | ||
| Quartile 1 | Reference | Reference |
| Quartile 2 | −72.28, 47.47, 0.13 | −43.63, 41.02, 0.29 |
| Quartile 3 | −47.28, 48.29, 0.33 | −51.93, 41.59, 0.21 |
| Quartile 4 | −19.96, 48.11, 0.68 | −81.16, 42.02, 0.05 |
| p trend = 0.4342 | ||
a
Adjusted for maternal race/ethnicity and preterm birth.
b
N = 137 women were missing covariate values.