PA-I (n=70) | PA+SB-I (n=61) | SB-I (n=69) | C (n=68) | Total (n=268) | ||||||
---|---|---|---|---|---|---|---|---|---|---|
T1 | T2 | T1 | T2 | T1 | T2 | T1 | T2 | T1 | T2 | |
Outcome variables % | ||||||||||
Recess MVPA | 27 | 29 | 33 | 28 | 26 | 28 | 28 | 22 | 28 | 26 |
Recess LPA | 38 | 44 | 39 | 39 | 39 | 41 | 39 | 38 | 39 | 41 |
Lunchtime MVPA | 29 | 22 | 32 | 29 | 28 | 21 | 33 | 24 | 30 | 24 |
Lunchtime LPA | 41 | 40 | 38 | 41 | 42 | 40 | 41 | 40 | 40 | 40 |
Potential mediators | ||||||||||
Social support from teachers* | 1.5 (1.4) | 1.9 (1.4) | 1.8 (1.4) | 2.5 (1.5) | 2.0 (1.3) | 1.8 (1.7) | 1.9 (1.3) | 1.3 (1.4) | 1.8 (1.4) | 1.9 (1.5) |
Perceived availability of line markings (% yes) | 53 | 71 | 57 | 67 | 44 | 68 | 74 | 75 | 57 | 71 |
Perceived accessibility of sports equipment (% yes) | 84 | 99 | 77 | 95 | 90 | 91 | 91 | 100 | 86 | 96 |
Perceived school environment† | 1.5 (0.8) | 1.4 (0.8) | 1.5 (0.8) | 1.5 (0.7) | 1.4 (1.4) | 1.3 (0.9) | 1.4 (0.8) | 1.4 (0.8) | 1.5 (1.0) | 1.4 (0.8) |
No significant baseline differences between the intervention groups and control group except lunchtime LPA, p<0.05, based on GLM models adjusted for clustering within schools.
*Ranged between 0 and 5, the higher values indicate more perceived social support.
†Ranged between −2and 2, higher positive scores indicate better perceived school environment.
C, control, usual practice group; LPA, light physical activity; MVPA, moderate-to-vigorous physical activity; PA-I, physical activity group; PA+SB-I, physical activity and sedentary behaviour combined group; SB-I, sedentary behaviour group.