Changes in fitness and physical activity outcomes at 6-month and 12-month follow-up between participants randomised to control or the Burn 2 Learn intervention
| Secondary outcomes | No of clusters (participants) | Mean change from baseline (95% CI) | Adjusted difference at follow-up* | |||
| Control | Intervention | Control | Intervention | Coefficient (95% CI) | P value | |
| Cardiorespiratory fitness (laps): 12 months | 10 (318) | 10 (329) | −6.79 (−8.96 to −4.63) | −5.18 (−7.77 to −2.59) | 1.43 (−1.42 to 4.29) | 0.326 |
| Upper body muscular endurance (reps): 6 months | 10 (312) | 10 (333) | −0.42 (−1.15 to 0.31) | 0.95 (0.35 to 1.55) | 1.23 (0.31 to 2.14) | 0.009 |
| Upper body muscular endurance (reps): 12 months | 10 (320) | 10 (333) | −0.34 (−1.05 to 0.38) | 1.53 (0.71 to 2.35) | 1.76 (0.77 to 2.76) | <0.001 |
| Lower body muscular power (cm): 6 months | 10 (329) | 10 (332) | 0.41 (−1.72 to 2.54) | −0.30 (−2.04 to 1.44) | −0.87 (−3.56 to 1.82) | 0.526 |
| Lower body muscular power (cm): 12 months | 10 (331) | 10 (332) | 4.62 (1.73 to 7.51) | 0.40 (−2.11 to 2.90) | −5.27 (−8.45 to −2.10) | <0.001 |
| BMI z-scores: 6 months | 10 (328) | 10 (335) | 0.07 (0.01 to 0.14) | 0.09 (0.04 to 0.13) | 0.02 (−0.06 to 0.09) | 0.604 |
| BMI z-scores: 12 months | 10 (328) | 10 (335) | 0.04 (−0.03 to 0.11) | 0.06 (−0.00 to 0.13) | 0.03 (−0.05 to 0.11) | 0.412 |
| MPA min/school hours: 6 months | 10 (229) | 10 (206) | −2.22 (−3.36 to −1.09) | −1.77 (−3.06 to −0.48) | 1.03 (−0.60 to 2.65) | 0.217 |
| MPA min/school hours: 12 months | 10 (229) | 10 (206) | −1.48 (−2.84 to −0.13) | −4.70 (−6.43 to −2.98) | −0.88 (−2.74 to 0.98) | 0.355 |
| VPA min/school hours: 6 months | 10 (229) | 10 (206) | 0.00 (−0.16 to 0.17) | 0.10 (−0.09 to 0.30) | 0.04 (−0.20 to 0.29) | 0.729 |
| VPA min/school hours: 12 months | 10 (229) | 10 (206) | −0.11 (−0.33 to 0.12) | −0.09 (−0.31 to 0.13) | 0.00 (−0.29 to 0.30) | 0.973 |
| MVPA min/school hours: 6 months | 10 (333) | 10 (337) | −2.22 (−3.46 to −0.98) | −1.59 (−2.95 to −0.24) | 1.12 (−0.63 to 2.86) | 0.212 |
| MVPA min/school hours: 12 months | 10 (333) | 10 (337) | −2.74 (−5.16 to −0.32) | −4.35 (−7.34 to −1.35) | −1.44 (−4.70 to 1.82) | 0.387 |
| Steps/school hours: 6 months | 10 (229) | 10 (206) | −981 (−1314 to –648) | −300 (−504 to –97) | 904 (535 to 1273) | <0.001 |
| Steps/school hours: 12 months | 10 (229) | 10 (206) | −969 (−1412 to −525) | −1014 (−1331 to −696) | 462 (45 to 879) | 0.030 |
| MPA min/weekday: 6 months | 10 (229) | 10 (206) | −3.85 (−5.84 to −1.85) | −4.03 (−5.95 to −2.11) | −0.05 (−2.55 to 2.44) | 0.966 |
| MPA min/weekday: 12 months | 10 (229) | 10 (206) | −2.32 (−4.55 to −0.09) | −4.15 (−7.01 to −1.29) | −1.49 (−4.49 to 1.52) | 0.333 |
| VPA min/weekday: 6 months | 10 (229) | 10 (206) | −0.08 (−0.42 to 0.26) | −0.02 (−0.32 to 0.27) | −0.08 (−0.51 to 0.35) | 0.715 |
| VPA min/weekday: 12 months | 10 (229) | 10 (206) | −0.42 (−0.87 to 0.02) | −0.19 (−0.51 to 0.12) | −0.02 (−0.52 to 0.48) | 0.929 |
| MVPA min/weekday: 6 months | 10 (333) | 10 (337) | −1.59 (−3.05 to −0.13) | −4.13 (−5.93 to −2.33) | −0.44 (−2.45 to 1.58) | 0.670 |
| MVPA min/weekday: 12 months | 10 (333) | 10 (337) | −5.03 (−11.59 to 1.52) | 1.13 (−4.30 to 6.56) | 3.32 (−3.42 to 10.05) | 0.337 |
| Steps/weekday: 6 months | 10 (229) | 10 (206) | −661 (−1002 to −320) | −461 (−813 to –110) | 171 (-224 to 566) | 0.398 |
| Steps/weekday: 12 months | 10 (229) | 10 (206) | −862 (−1274 to −451) | −826 (−1359 to –293) | −249 (−735 to 236) | 0.314 |
| MPA min/weekend day: 6 months | 10 (164) | 10 (139) | −5.05 (−11.41 to 1.31) | 1.18 (−4.13 to 6.49) | 3.55 (−2.97 to 10.08) | 0.288 |
| MPA min/weekend day: 12 months | 10 (182) | 10 (153) | −8.47 (−16.65 to −0.28) | 2.75 (−6.90 to 12.39) | 6.64 (−0.50 to 13.78) | 0.070 |
| VPA min/weekend day: 6 months | 10 (164) | 10 (139) | 0.02 (−0.43 to 0.46) | −0.05 (−0.38 to 0.27) | −0.22 (−0.67 to 0.22) | 0.331 |
| VPA min/weekend day: 12 months | 10 (182) | 10 (153) | 0.18 (−0.51 to 0.88) | −0.25 (−0.69 to 0.20) | −0.59 (−1.14 to −0.04) | 0.035 |
| MVPA min/weekend day: 6 months | 10 (333) | 10 (337) | −3.93 (−6.11 to −1.75) | −4.05 (−6.13 to −1.98) | −0.09 (−2.83 to 2.64) | 0.946 |
| MVPA min/weekend day: 12 months | 10 (333) | 10 (337) | −8.28 (−16.58 to 0.01) | 2.50 (−7.28 to 12.28) | 6.08 (−1.25 to 13.41) | 0.106 |
| Steps/weekend day: 6 months | 10 (164) | 10 (139) | −107 (−1208 to 995) | 438 (−584 to 1459) | 230 (−871 to 1331) | 0.683 |
| Steps/weekend day: 12 months | 10 (182) | 10 (153) | −912 (−2218 to 395) | 815 (−736 to 2366) | 1215 (−8 to 2438) | 0.053 |
*Adjusted difference ((intervention post-test mean−intervention baseline mean)−(control post-test mean−control baseline mean)) in secondary outcomes at 6 months and 12 months between treatment groups. P value adjusted for cluster effect, randomisation pair and accelerometer wear-time for physical activity outcomes.
BMI z-scores, Body mass index scores standardised to age and sex; MPA, moderate physical activity; MVPA, moderate-to-vigorous physical activity; VPA, vigorous physical activity.