Table 2 ODI, EQ5D and WHOQOL-BREF (with four domains) in cohorts I and II
| Cohort I | Cohort II | |
|---|---|---|
| ODI (%) | 14.40 (0–70) | 30.40 (0–70) |
| EQ5D | 6.18 (0–9) | 7.29 (0–11) |
| EQ5D VAS | 77.90 (50–100) | 62.07 (5–100) |
| WHOQOL-BREF | 8.07 (4–10) | 6.64 (2–10) |
| Physical health | 15.46 (4–20) | 13.00 (6–20) |
| Psychological health | 16.07 (9–20) | 15.57 (11–20) |
| Social relationships | 16.61 (7–20) | 15.67 (8–20) |
| Environment | 17.29 (12–20) | 15.00 (11–20) |
