Table 3.
Time varying variables
| Mean (SD) | ||||
|---|---|---|---|---|
| Instrument | Component | Baseline (n = 515) | 6 months (n = 463) | 12 months (n = 451) |
| EQ-5D | Visual Analogue Scale (0–100; higher score is better) | 69.2 (17.7) | 78.3 (15) | 78.2 (14.5) |
| EQ-5D utility | Utility score (−0.148 to 1; higher positive score is better) | 0.59 (0.21) | 0.82 (0.14) | 0.82 (0.14) |
| SF-12 | Physical Composite Scale (PCS) Score (0–100; higher score is better) | 34.3 (7.5) | 43.2 (12.6) | 44.9 (9.2) |
| Mental Health Composite Scale (MCS) Score (0–100; higher score is better) | 51.6 (10.7) | 54.0 (8.8) | 54.0 (8.7) | |
| WOMAC | Pain (0–20; higher score, more pain) | 10.1 (3.6) | 3.4 (3.0) | 2.9 (3.2) |
| Stiffness (0–8; higher score, more stiffness) | 4.2 (1.7) | 2.1 (1.6) | 1.7 (1.5) | |
| Physical Function (0–68; higher score, more limitations) | 33.8 (11.9) | 13.2 (11.2) | 12.4 (11.5) | |
| HADS | Anxiety (0–21; higher score, more anxiety) | 5.6 (3.9) | 4.0 (3.4) | 4.1 (3.6) |
| Depression (0–21; higher score, more depression) | 4.8 (3.3) | 3.1 (3.2) | 3.3 (3.1) | |
| SLANSS | Neuropathic pain (0–24; score > =12, pain of neuropathic origin) | 7.0 (6.6) | 6.4 (6.9) | 5.7 (6.4) |