23 September 2022: Clinical Research
Reliability and Validity of Patient-Reported Outcome Measures for Ankle Instability in Hebrew
Uri Gottlieb 1ABCDEF* , Tomer Yona 2BDE , David Shein Lumbroso 1BDE , Jay R. Hoffman 1E , Shmuel Springer 1ABCDEFDOI: 10.12659/MSM.937831
Med Sci Monit 2022; 28:e937831
Table 3 Psychometric characteristics of all instruments.
| Instrument | Sample size (n) | Internal consistency (α) | Test-retest reliability (ICC) | Construct validity | Floor and ceiling effects (CAI group) | Cut-off score | SEM | MDC |
|---|---|---|---|---|---|---|---|---|
| AII | 168 | 0.86 (0.82–0.89) | 0.82 (0.71–0.90) | CAIT: 0.85IdFAI: 0.90FAAM: 0.75FAAM 0.83SF-12 PCS: 0.36SF-12 MCS: 0.12 | Floor: NoneCeiling: 7.5% | ≥5 | 0.71 | 1.96 |
| CAIT | 172 | 0.89 (0.86–0.91) | 0.88 (0.79–0.93) | AII: 0.85IdFAI: 0.87FAAM: 0.84FAAM: 0.87SF-12 PCS: 0.44SF-12 MCS: 0.17 | None | ≤23 | 1.85 | 5.14 |
| IdFAI | 162 | 0.91 (0.89–0.93) | 0.73 (0.56–0.84) | AII: 0.90CAIT: 0.87FAAM: 0.75FAAM: 0.84SF-12 PCS: 0.49SF-12 MCS: 0.11 | None | ≥13 | 3.1 | 8.6 |
| FAAM | 161 | 0.95 (0.94–0.96) | 0.84 (0.73–0.91) | AII: 0.75CAIT: 0.84IdFAI: 0.76FAAM: 0.84SF-12 PCS: 0.49SF-12 MCS: 0.20 | Floor: NoneCeiling: 5.7% | ≤97.5 | 4.5 | 12.5 |
| FAAM | 161 | 0.96 (0.95–0.97) | 0.88 (0.79–0.93) | AII: 0.83CAIT: 0.88IdFAI: 0.84FAAM: 0.84SF-12 PCS: 0.42SF-12 MCS: 0.19 | Floor: NoneCeiling: 1.1% | ≤87.5 | 7.0 | 19.5 |
| ICC – Intraclass Correlation Coefficient; CAI – Chronic Ankle Instability; SEM – Standard Error of the Measurement; MDC – Minimal Detectable Change; AII – Ankle Instability Instrument; CAIT – Cumberland Ankle Instability Tool; IdFAI – Identification of Functional Ankle Instability; FAAM – Foot and Ankle Ability Measure; ADL – Activities of Daily Living; SF – short-form; PCS – Physical Component Score; MCS – Mental Component Score. | ||||||||