Mean differences in key outcome measures between while subjects were on creatine compared to on placebo.
| Mean Difference | P | |
|---|---|---|
| Peak power, watts | 9.5 | 0.77 |
| Fatigue index, % | 1.09 | 0.77 |
| Total MET | –1.24 | 1 |
| MVPA, no. 30-min blocks | 0.11 | 0.87 |
| VPA, no. 30-min blocks | –0.57 | 0.16 |
| CHAQ (/3) | 0.005 | 0.81 |
| Illness rating (/100) | –2.60 | 0.24 |
| Pain rating (/100) | –0.26 | 0.93 |
| PedsQL Fatigue Index (/100) | 3.6 | 0.98 |
| Right hand grip, kg | –0.26 | 0.91 |
| Left hand grip, kg | –0.90 | 0.62 |
| Max jump, inches | –0.21 | 0.82 |
| Physician global assessment (/100) | 1.31 | 0.64 |
| Patient global assessment (/100) | –0.56 | 0.89 |
| MMT-8 (/80) | 0.81 | 0.59 |
| CMAS (/52) | –0.08 | 0.88 |
| Muscle disease activity (/100) | –0.25 | 0.78 |
| Global disease activity (/100) | 1.24 | 0.69 |
| Overall QoML (/100) | 3.03 | 0.64 |
| Health-related QOL (/100) | 1.60 | 0.13 |
| YMCA-estimated peak VO2 | 0.84 | 0.37 |
| Body fat, % | 0.01 | 0.99 |
| Waist circumference, cm | 1.51 | 0.05 |
CHAQ: Childhood Health Assessment Questionnaire; CMAS: Childhood Myositis Assessment Scale; MET: metabolic equivalents; MMT: manual muscle testing; MVPA: moderate to vigorous physical activity; PedsQL: Pediatric Quality of Life; QOL: quality of life; QoML: Quality of My Life; VPA: vigorous physical activity.