Table 2.
Floor and ceiling effects for all the instruments in the 96 patients completing the first evaluation
| Instrument | Floor effects (worst status) (%) | Ceiling effects (best status) (%) |
|---|---|---|
| COMI LBP | 0 | 1.1 |
| COMI LP | 1.1 | 19.1 |
| COMI worst pain (leg or back) | 1.1 | 0 |
| COMI function | 2.1 | 6.3 |
| COMI symptom-specific well-being | 24.0 | 0 |
| COMI quality of life | 1.0 | 2.1 |
| COMI social disability | 20.0 | 33.7 |
| COMI work disability | 15.1 | 55.9 |
| COMI summary score | 0 | 0 |
| Roland Morris score | 2.2 | 3.2 |
| EQ-5D mobility | 0 | 46.9 |
| EQ-5D self-care | 0 | 66.7 |
| EQ-5D usual activities | 4.2 | 30.2 |
| EQ-5D pain | 10.4 | 8.3 |
| EQ-5D anxiety/depression | 1.1 | 56.8 |
| EQ-5D summary index score | 0 | 6.3 |
| EQ-5D VAS general health | 0 | 0 |
| WHOQoL physical | 0 | 0 |
| WHOQoL psychological | 0 | 0 |
| WHOQoL social | 0 | 1.2 |
| WHOQoL environmental | 0 | 0 |
| WHOQoL whole score | 0 | 0 |
Italicised rows indicate scores from scales with more than one item