Table 4.
Subgroup analysis of patients performing at maximal effort at initial and follow up exercise stress test
| Variable | Initial test value | Follow up | Difference | P-value |
|---|---|---|---|---|
| Age at test (years) | 12.2 (2.7) | 15.9 (3.2) | 3.7 (1.6) | |
| Minute oxygen consumption at peak exercise (% of predicted) | 81 (15) | 84 (14) | 3 (14) | 0 .36 |
| Minute oxygen consumption at anaerobic threshold (% of predicted) | 87 (18) | 88 (18) | 1 (21) | 0 .85 |
| Forced vital capacity (% of predicted) | 80 (11) | 89 (14) | 9 (9) | <0 .0001 |
| Maximal work rate (% of predicted) | 91 (20) | 88 (17.33) | −3 (17) | 0 .43 |
| Indexed oxygen pulse (ml/kg/min/m2) | 5.1 (1.5) | 7.7 (1.9) | 2.6 (0 .62) | 0 .17 |
| Maximum heart rate | 180 (19) | 180 (14) | 1 (11) | 0 .69 |
Values are mean (± standard deviation) or median (IQR).