Table 6 Summary of studies that used thenar atrophy as an outcome measure
| Study | Scale | Grading |
|---|---|---|
| Borisch et al 2003 [23] | NR | NR |
| Brown et al 1993 [10] | 0–3 | 0(absent), 1(mild) 2(moderate), 3(severe) |
| Mackinnon et al 1991 [8] | NR | None, mild, moderate and severe |
| Shum et al 2002 [21] | NR | NR |
| Trumble et al 2002 [20] | NR | Present/absent |