Table 7.
Self-reported physical activity of participants in nested randomised trial: between treatment group comparison a
| Outcome | Time point | Walking group (n = 257) b | Information only (n = 269) b | Adjusted treatment × time interaction P -value c | Adjusted treatment effect | |
|---|---|---|---|---|---|---|
| P | 95% CI | |||||
| Commuting activityd | Trial entry | 227.30 (281.27) | 240.47 (243.97) | 0.24 | 0.63 | 17.41 (−54.57 to 89.39) |
| 28 weeks | 218.05 (176.55) | 200.32 (287.47) | ||||
| 36 weeks | 292.52 (366.32) | 185.01 (178.98) | ||||
| 4 months | 248.44 (263.20) | 390.00 (512.82) | ||||
| Leisure activitye | Trial entry | 1048.02 (1311.53) | 877.42 (1146.34) | 0.04 | 0.11 | 174.72 (−41.93 to 391.38) |
| 28 weeks | 1048.30 (1248.43) | 911.11 (1212.73) | 0.36 | 108.50 (−125.45 to 342.44) | ||
| 36 weeks | 796.16 (1011.25) | 727.39 (810.12) | 0.67 | 52.10 (−188.17 to 292.38) | ||
| 4 months | 1178.16 (1071.98) | 1374.64 (1411.67) | 0.08 | −236.04 (−503.44 to 31.37) | ||
| Household activity | Trial entry | 3437.45 (3353.79) | 2961.20 (2924.20) | 0.19 | 0.16 | 294.44 (−114.88 to 703.76) |
| 28 weeks | 3441.23 (3085.54) | 2697.92 (2732.72) | ||||
| 36 weeks | 3208.16 (3005.22) | 2951.82 (3111.69) | ||||
| 4 months | 4862.53 (4204.93) | 4672.32 (3766.02) | ||||
| Work-related activityd | Trial entry | 4440.89 (2743.25) | 4888.99 (3130.39) | 0.19 | 0.26 | −259.57 (−710.22 to 191.08) |
| 28 weeks | 4121.12 (2359.13) | 4409.20 (2735.41) | ||||
| 36 weeks | 3512.04 (1852.27) | 4035.94 (2274.21) | ||||
| 4 months | 3454.71 (2619.25) | 3144.64 (2212.72) | ||||
| Total activity | Trial entry | 7524.07 (4657.16) | 7311.45 (4318.89) | 0.75 | 0.40 | 247.31 (−332.35 to 826.98) |
| 28 weeks | 7169.05 (3823.28) | 6564.51 (3898.19) | ||||
| 36 weeks | 5888.77 (3688.15) | 5479.91 (4066.69) | ||||
| 4 months | 6526.84 (4637.30) | 6641.77 (4494.63) | ||||
aValues are mean ± SD and treatment effects are differences in means (with 95% confidence interval and P-value) across all time points estimated from a linear mixed effects model including treatment and time, adjusted for centre, parity and BMI.
bIncludes women who had a live birth, and who answered one or more questionnaires; excludes questionnaires where the total hours of activity per week reported exceeded the number of hours in a week.
cWhere the treatment × time interaction was not statistically significant, it was dropped from the model.
dWhere women participated in these activities.
eValues are mean ± SD and treatment effects are differences in means (with 95% confidence interval and P-value) by time point estimated from a linear mixed effects model including treatment, time and treatment × time, adjusted for centre, parity and BMI.