| MEASUREMENT PROPERTIES | |
| Limitations | >=5 European languages (English) |
| Observations |
Two of the 17 potential items showed a particularly strong floor effect, with 70 (66%) and 60 (57%) cases, respectively, giving the response ‘No, not at all’ to items concerned with ‘difficulty using the lavatory’ and ‘trouble with transport’. Consequently, these two items were excluded. |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
The Cronbach’s α coefficients for the three Oxford elbow score domains were pain 0.89, elbow function 0.90, social-psychological 0.84, and following deletion of each item the coefficients revealed that no one item had a particularly large effect on the reliability of each domain.Thus each factor had a high level of internal reliability and none exceeded 0.90, which would indicate item redundancy |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
The intraclass correlation coefficient comparing these with measures of the Oxford elbow score scales obtained at least 48 hours earlier were pain 0.98, elbow function 0.89 and social-psychological 0.87 (all statistically significant p < 0.001). |
| 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 | Not Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
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| B. Construct Validity: Structural validity |
Not Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Tested |
| Brief Description | |
| C. Criterion validity | Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
The OES Function scale and the DASH performed similarly on ROC analysis, but with the OES Pain and Social-Psychological scales demonstrating superior efficiency. |