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| Score | Definition |
|---|---|
| 0 | Fully active without any restrictions to daily activities. |
| 1 | Able to ambulate and carry out light works only. |
| 2 | Able to ambulate >50% of waking hours and perform self-care. |
| 3 | Confined to bed/chair >50% of waking hours and limited self-care. |
| 4 | Total confinement to bed/chair and unable to perform any self-care. |
