Table 6 Floor and ceiling effects of the Patient Enablement Instrument for Back pain based on 261 participants with non-specific low back pain
| Â | Scale range | Classical method | Scale width method | ||
|---|---|---|---|---|---|
Floor effect (%) | Ceiling effect (%) | Floor effect (%) | Ceiling effect (%) | ||
PEI-BP sum score | 0–60 | 0.0 | 2.7 | 0 | 29.9 |