Characteristics of study groups at baseline and comparison of activity results between study groups at reassessment
| A: Characteristics of study groups at baseline | |||
| Intervention group (n=82) | Control group (n=81) | P value | |
| Mean age | 8.50 | 8.32 | 0.45 |
| Number of males | 50 (60.9%) | 50 (61.7%) | 0.92 |
| Mean BMI SDS | −0.06 | 0.06 | 0.53 |
| Mean height SDS | −0.17 | −0.10 | 0.69 |
| Mean weight SDS | −0.18 | −0.02 | 0.41 |
| Diagnostic subgroup | |||
| Acyanotic no intervention | 17 (20.7%) | 13 (16.0%) | 0.69 |
| Acyanotic corrected | 30 (36.6%) | 31 (38.3%) | |
| Cyanotic corrected | 20 (24.4%) | 25 (30.9%) | |
| Cyanotic palliated | 15 (18.3%) | 12 (14.8%) | |
| Participation in PE | |||
| Above average | 6 (9.1%) | 6 (9.1%) | 0.66 |
| Same as | 47 (70.1%) | 47 (71.2%) | |
| Same as with breaks | 2 (3%) | 2 (3%) | |
| Below average | 12 (17.9%) | 9 (13.6%) | |
| Not at all | 0 | 2 (3%) | |
| B: Comparison of activity results between study groups at reassessment | ||||
| Intervention group | Control group | Test statistic | Estimated effect size (95% CI) | |
| EST duration, min (mean±SD) | ||||
| Baseline | 5.94±1.87 | 5.89±2.05 | F=13.09, df=1150 p<0.001 | 0.71 min (0.32 to 1.10) |
| Reassessment | 6.64±2.15 | 5.89±2.14 | ||
| EST power output, W (mean±SD) | ||||
| Baseline | 68.72±13.98 | 68.56±15.27 | F=13.51, df=1150 p<0.001 | 5.98 W (2.76 to 9.19) |
| Reassessment | 74.50±18.12 | 68.37±16.14 | ||
| Average daily MVPA, min (mean±SD) | ||||
| Baseline | 42.50±22.75 | 45.22±27.56 | F=1.021 df=1133 p=0.314 | 4.40 min (−4.21 to 13.0) |
| Reassessment | 49.62±25.11 | 47.94±26.54 | ||
| Average daily step count (mean±SD) | ||||
| Baseline | 8823.37±2302.17 | 8858.34±2898.05 | F=1.47 df=1133 p=0.23 | 611.24 (−387.1 to 1609.6) |
| Reassessment | 9883.24±2694.20 | 9306.97±2464.87 | ||
BMI, body mass index; EST, exercise stress test; MVPA, moderate to vigorous activity; PE, peak exercise; SDS, SD score.