| MEASUREMENT PROPERTIES | |
| Limitations | <5 European languages (English) |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
Internal consistency reliability (Cronbach’s alpha) of HOOS-12 scales ranged from 0.77-0.78 (HOOS-12 Pain), 0.81-0.84 (HOOS-12 Function) and 0.79-0.82 (HOOS-12 QOL) before to 6-12 months after THR in the U.S. hip OA cohort. Internal consistency reliability of the HOOS-12 Summary impact score ranged from 0.91-0.92 before to 6-12 months after THR |
| B. Reliability intraobserver or test-retest | Not Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
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| C. Reliability interobserver or Measurement error | Not Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
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| 2. VALIDITY | |
| A. Content validity: face validity | Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
The average inter-item correlations did not differ greatly between corresponding HOOS-12 and HOOS scales, indicating that reliability differences were primarily due to differences in scale length |
| B. Construct Validity: Structural validity |
Not Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Tested |
| Brief Description | |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
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