Table 4 Substitution of light or moderate/vigorous leisure time physical activity for sedentary behavior and associations with offspring birthweight (g)
| Â | Overall | Low sedentary time | High sedentary time |
|---|---|---|---|
| Â | Mean differencea (95% CI) | ||
Pre-pregnancy (n = 1373) | |||
 Light physical activity (hours/week) | −48 (− 116, 21) | −54 (− 147, 39) | −57 (− 154, 41) |
 Moderate/vigorous physical activity (hours/week) | 0.4 (− 5.2, 6.0) | − 2.7 (− 13, 7.8) | 4.5 (− 4.0, 13) |
P for interaction = 0.96 for light physical activity, 0.28 for moderate/vigorous physical activity | |||
Early pregnancy (n = 1535) | |||
 Light physical activity (hours/week) | −1.2 (− 19, 17) | 11 (− 5.5, 27) | −8.3 (− 44, 27) |
 Moderate/vigorous physical activity (hours/week) | −4.7 (− 12, 2.0) | −10 (− 22, 1.8) | −1.9 (− 12, 8.3) |
P for interaction = 0.18 for light physical activity, 0.67 for moderate/vigorous physical activity | |||