Score values of muscle strength tools in the 3 patient datasets.
| N | Mean (SD) | Min–Max | Median (1st–3rd Quartile) | Median Value/Maximum Score (%) | |
|---|---|---|---|---|---|
| Routine dataset | |||||
| MMT-4 (0–40) | 115 | 32.6 (7.7) | 10–40 | 36 (28–39) | 90 |
| MMT-6 (0–60) | 115 | 50.6 (10.2) | 20–60 | 54 (44–59) | 90 |
| MMT-8 (0–80) | 115 | 68.8 (12.6) | 26–80 | 73 (61–79) | 91.3 |
| CMAS (0–52) | 93 | 41.3 (12.2) | 5–52 | 47 (34–52) | 90.4 |
| hMC (0–100) | 102 | 82.3 (18.6) | 26–100 | 89 (68–98) | 89 |
| JDM trial dataset | |||||
| MMT-4 (0–40) | 137 | 18.6 (8.9) | 0–38 | 19 (12–25) | 47.5 |
| MMT-6 (0–60) | 136 | 30.6 (13.3) | 0–58 | 32 (22–40) | 53.3 |
| MMT-8 (0–80) | 136 | 44 (17.6) | 2–78 | 46 (33.5–57) | 57.5 |
| CMAS (0–52) | 139 | 22.1 (12.6) | 0–51 | 20 (13–33) | 38.5 |
| hMC (0–100) | 138 | 48.2 (20.9) | 0–97 | 49 (34–63) | 49 |
| Outcome dataset | |||||
| MMT-4 (0–40) | 322 | 37.4 (5.5) | 6–40 | 40 (37–40) | 100 |
| MMT-6 (0–60) | 322 | 56.6 (7.5) | 10–60 | 60 (57–60) | 100 |
| MMT-8 (0–80) | 322 | 76 (9.3) | 15–80 | 80 (77–80) | 100 |
| CMAS (0–52) | 322 | 47.5 (9) | 1–52 | 51 (47–52) | 98.1 |
| hMC (0–100) | 322 | 93.2 (13.2) | 15–100 | 99 (93–100) | 99 |
CMAS: Childhood Myositis Assessment Scale; hMC: hybrid MMT-8/CMAS; JDM: juvenile dermatomyositis; MMT: Manual Muscle Test.