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Chen functional recovery score.
| Grade | Qualification | Description |
|---|---|---|
| I | Excellent | Able to resume original work with the injured hand, ROM > 60% of original, complete sensory recovery, and M4–5 motor power |
| II | Good | Able to resume suitable work without injured hand, ROM > 40%, near complete sensibility, and M3–4 motor power |
| III | Fair | Able to carry on daily life, ROM > 30%, partial recovery of sensibility, and M3 motor power |
| IV | Poor | Poor, almost non-useful function of limb |
ROM: range of motion.
