Table 2 Between group mean differences in students’ change in physical activity levels during school hours
1. Intervention | 2. Control | Group x Intervention Day Differential effect | ||||
|---|---|---|---|---|---|---|
Outcome | Intervention day mean (SD) | Usual day mean (SD) | Comparison day mean (SD) | Usual day mean (SD) | Estimatea | p-value |
Moderate-vigorous physical activity (MVPA) | ||||||
Girls | 36.87 (SD = 11.49) | 36.24 (SD = 12.19) | 35.56 (SD = 11.81) | 35.57 (SD = 12.00) | 0.76 [−0.47; 1.99] | 0.22 |
Boys | 40.99 (SD = 12.55) | 39.76 (SD = 12.11) | 40.52 (SD = 12.65) | 40.38 (SD = 13.13) | 0.64 [−0.65; 1.92] | 0.32 |
All students | 38.88 (SD = 12.19) | 37.94 (SD = 12.27) | 37.94 (SD = 12.53) | 37.83 (SD = 12.77) | 0.71 [−0.18; 1.60] | 0.11 |
Counts per minute (cpm) | ||||||
Girls | 2572.00 (SD = 475.56) | 2530.32 (SD = 516.98) | 2500.05 (SD = 477.19) | 2495.40 (SD = 491.03) | 36.99 [−13.88; 87.86] | 0.15 |
Boys | 2820.61 (SD = 522.13) | 2764.54 (SD = 516.01) | 2783.29 (SD = 524.40) | 2759.39 (SD = 537.64) | 35.04 [−18.34; 88.41] | 0.19 |
All students | 2693.38 (SD = 513.86) | 2643.55 (SD = 529.51) | 2634.83 (SD = 521.72) | 2619.25 (SD = 530.37) | 36.41 [−0.42; 73.23] | 0.053 |
Light physical activity | ||||||
Girls | 115.00 (SD = 17.92) | 111.82 (SD = 19.73) | 113.18 (SD = 20.65) | 111.77 (SD = 18.91) | 1.47 [−0.06; 3.00] | 0.059 |
Boys | 118.69 (SD = 18.81) | 115.06 (SD = 19.26) | 116.47 (SD = 20.66) | 114.81 (SD = 19.11) | 0.58 [−1.02; 2.19] | 0.47 |
All students | 116.80 (SD = 18.45) | 113.39 (SD = 19.57) | 114.72 (SD = 20.70) | 113.18 (SD = 19.05) | 1.06 [−0.05; 2.17] | 0.06 |
Sedentary activity | ||||||
Girls | 201.31 (SD = 25.62) | 204.18 (SD = 28.33) | 203.87 (SD = 26.80) | 204.01 (SD = 27.08) | −2.23 [−4.49; 0.02] | 0.052 |
Boys | 193.16 (SD = 25.60) | 195.39 (SD = 27.21) | 195.02 (SD = 26.65) | 198.35 (SD = 26.15) | −1.22 [−3.58; 1.15] | 0.31 |
All students | 197.33 (SD = 25.92) | 199.93 (SD = 28.13) | 199.68 (SD = 27.08) | 201.34 (SD = 26.81) | −1.77 [−3.40; −0.14] | 0.035* |