Table 2 Within-group change and between-group change in physical activity behaviors and psychosocial measures from baseline to midpoint (12Â weeks) and intervention end point (24Â weeks)
| Â | 0 to 12Â weeks | 0 to 24Â weeks | ||||||
|---|---|---|---|---|---|---|---|---|
|  | Control participants (n = 95) | Intervention participants (n = 87) | Difference between groups | Control participants (n = 95) | Intervention participants (n = 87) | Difference between groups | ||
|  | Mean change ± S.D | Mean change ± SD | Estimate (95%CI) | P value | Mean change ± S.D | Mean change ±  S.D | Estimate (95%CI) | P value |
Behaviors (Accelerometry) | ||||||||
 Average Light Physical Activity (minutes/day) | 0.7 ± 8.4 | 26.4 ± 8.5 | 25.67 (2.36,48.97) | 0.031 | -0.4 ± 8.4 | 2 ± 8.4 | 1.21 (-21.80,24.21) | 0.918 |
 Average Moderate to Vigorous Physical Activity (minutes/day) | -0.2 ± 1.5 | 7.9 ± 1.6 | 8.13 (3.87,12.40) |  < 0.001 | -0.6 ± 1.7 | 5.8 ± 1.6 | 6.43 (1.48,11.38) | 0.011 |
Behaviors (Survey) | ||||||||
 IPAQ total MET minutes per week | 169.3 ± 147.8 | 895.1 ± 207.2 | 725.77 (242.96,1208.59) | 0.003 | 93.4 ± 172 | 1062.4 ± 271.4 | 955.90 (355.93,1555.86) | 0.002 |
 IPAQ walking MET minutes per week | -23.1 ± 68.7 | 58.7 ± 89 | 81.77 (-133.59,297.13) | 0.457 | -24.2 ± 83.3 | 164.8 ± 89.3 | 191.50 (-47.31,430.31) | 0.116 |
 IPAQ moderate MET minutes per week | -5.5 ± 50.4 | 275.4 ± 77.1 | 280.91 (103.36,458.46) | 0.002 | 54.3 ± 67.6 | 328.1 ± 111.8 | 269.82 (27.01,512.63) | 0.029 |
 IPAQ vigorous MET minutes per week | 197.9 ± 109.6 | 560.9 ± 119.9 | 363.09 (45.96,680.21) | 0.025 | 63.3 ± 96.2 | 569.5 ± 154.1 | 494.58 (158.12,831.04) | 0.004 |
 SBQ: Total sitting hours per week | -8.5 ± 3.3 | -11.7 ± 2.8 | -3.20 (-11.22,4.83) | 0.434 | -9.9 ± 3.5 | -8.2 ± 3.5 | 1.67 (-7.58,10.93) | 0.723 |
Psychosocial measures (Survey) | ||||||||
 Self-efficacy for sticking to exercise habits (scale 1 to 5) | -0.5 ± 0.1 | 0.1 ± 0.1 | 0.54 (0.22,0.87) | 0.001 | -0.3 ± 0.1 | -0.02 ± 0.1 | 0.33 (-0.09,0.75) | 0.124 |
 Self-efficacy for making time for exercise (scale 1 to 5) | -0.4 ± 0.1 | -0.2 ± 0.1 | 0.28 (-0.05,0.61) | 0.091 | -0.5 ± 0.1 | -0.2 ± 0.1 | 0.29 (-0.13,0.72) | 0.174 |
 Family participation in exercise (scale 10 to 50) | -0.6 ± 1.2 | 3.3 ± 1.1 | 3.87 (0.53,7.2) | 0.023 | -1.1 ± 1.3 | 4.9 ± 1.5 | 5.69 (1.78,9.61) | 0.005 |
 Friend participation in exercise (scale 10 to 50) | -0.5 ± 1.5 | 6.7 ± 1.5 | 7.18 (3,11.36) | 0.001 | 1.7 ± 1.8 | 6.1 ± 1.5 | 4.46 (-0.08,9.01) | 0.054 |
 Family rewards and punishment for exercise (scale 3 to 15) | 0.04 ± 0.4 | -0.1 ± 0.3 | -0.11 (-1.14,0.92) | 0.838 | 0.2 ± 0.3 | 0.3 ± 0.4 | -0.06 (-2.18,2.06) | 0.954 |
 Combined attitude toward exercise score (scale 1 to 14) | -0.1 ± 0.05 | -0.2 ± 0.04 | -0.11 (-0.24,0.02) | 0.094 | -0.1 ± 0.1 | -0.2 ± 0.1 | -0.18 (-0.34,-0.01) | 0.033 |