Table 3.
Adjusted linear regression coefficients assessing the independent association between average PA (steps/day) in pregnancy and birthweight (g).
| Parameter estimates |
|||
|---|---|---|---|
| Predictors | β | SE | p-Value |
| Primary exposures | |||
| Average PA (steps/day) | 0.03 | 0.03 | 0.3037 |
| Covariates | |||
| Maternal age (y) | 7.53 | 12.06 | 0.5342 |
| Gestational age (weeks) | 144.28 | 29.97 | <0.0001 |
| Gestational weight gain (17 to 28 wks) | 10.76 | 7.24 | 0.1408 |
| Group allocation | |||
| Exercise | −16.06 | 131.98 | 0.9034 |
| Stretching (referent) | – | – | – |
*Gestational weight gain represents weight gain during 17 weeks and 28 weeks of gestation. (corresponding to participant laboratory visits). Note: No. of PA days represents the number of days the pedometer was worn during pregnancy.