| No pain/ Difficulty | Mild | Moderate | Severe | P value | |
|---|---|---|---|---|---|
| Mean (sd) | Mean (sd) | Mean (sd) | Mean (sd) | ||
| n | 49 | 135 | 80 | 43 | |
| % of total | 16.0 | 44.0 | 26.1 | 14.0 | |
| Age | 63.3 (7.1) | 60.5 (8.1) | 62.1 (8.7) | 61.3 (8.0) | |
| WOMAC Pain [0–20] | 3.0 (2.3) | 5.2 (2.6) | 7.5 (2.9) | 11.0 (2.9) | <0.0001 |
| WOMAC Function [0–68] | 11.4 (8.8) | 16.8 (9.4) | 25.1 (12.3) | 36.9 (9.3) | <0.0001 |
| EQ5D [0,1] | 0.9 (0.1) | 0.8 (0.2) | 0.7 (0.2) | 0.4 (0.3) | <0.0001 |
| EUROQOL VAS [0,100] | 76.2 (12.1) | 72.8 (15.1) | 63.8 (15.0) | 52.7 (14.9) | <0.0001 |
| Walking time | 90.9 (53.3) | 95.7 (84.9) | 55.5 (47.7) | 19.1 (12.1) | <0.0001 |