| MEASUREMENT PROPERTIES | |
| Limitations | English only |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
1) 0.88 2) 0.88 3) 0.92 4) 0.80 5) 0.90 |
| B. Reliability intraobserver or test-retest | Not Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
|
| 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) |
Focus groups (workers with chron. cond.) Cognitive interviews; alternate form comparison (stem/ response) |
| B. Construct Validity: Structural validity |
Not Tested |
| Hypotheses-testing | Not Tested |
| Cross-cultural validity | Not Tested |
| Brief Description | |
| C. Criterion validity | Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
SF-36 (MC) r=-0.60 SF-36 (PC) -0.49 VAS fatigue: 0.50 VAS pain: 0.46 HAQ: 0.56 WALS 0.61 SFS-6 0.63 EWPS 0.61 WIS-RA 0.67 |