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Distribution of clinical characteristics based on Kellgren-Lawrence radiographic grade.
| Kellgren-Lawrence Grade | 0 | 1 | 2 | 3 |
|---|---|---|---|---|
| Correlation between pre and postoperative WOMAC pain score | 0.5 | 0.5 | 0.5 | 0.4 |
| Baseline WOMAC pain score | 65 | 65 | 65 | 60 |
| Improvement in WOMAC pain score for surgically treated subjects | 20 | 15 | 5 | 3 |
| Improvement in WOMAC pain score for nonoperatively treated subjects | 8 | 5 | 3 | 0 |
WOMAC pain score has theoretical range from 0 (worst pain) and 100 (no pain)
