| MEASUREMENT PROPERTIES | |
| Limitations | >=5 European languages (English) |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
The internal-consistency reliabilities of these short-form measures were lower, but not much lower, than their full-length versions. Reliability Cronbach's coefficients for the multi-item health scales ranged from 0.81 to 0.88 |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
Test-retest reliability was 0.96 (ICC) |
| C. Reliability interobserver or Measurement error | Not Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
|
| 2. VALIDITY | |
| A. Content validity: face validity | Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
The panel of experts concluded that the items appear valid. The MOS-20 survey achieves breadth and depth of measurement, while permitting self-administration in only 3-4 minutes. By virtue of its reduction of respondent burden by 80% relative to the lengthier measures from which it was derived, this short-form survey offers a more practical approach to patient health assessment. |
| B. Construct Validity: Structural validity |
Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Not Tested |
| Brief Description |
The PCA analysis identified four factors (loadings 0.54-0.74). |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
|