Table 4 Percentages of cases and controls for knee flexor and extensor muscle strength tests (MRC)
Knee extensor muscle strength | Knee flexor muscle strength | |||
|---|---|---|---|---|
Control | Cases | Control | Cases | |
Grade 0 (%) | 0 | 0 | 0 | 0 |
Grade 1 (%) | 0 | 0 | 0 | 0 |
Grade 2 (%) | 0 | 8 | 0 | 0 |
Grade 3 (%) | 0 | 12 | 0 | 4 |
Grade 4 (%) | 4 | 46 | 0 | 35 |
Grade 5 (%) | 96 | 35 | 100 | 61 |