| MEASUREMENT PROPERTIES | |
| Limitations | <5 European languages (English) |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
Core-FM: 0.78 Distress-FM: 0.51 (Poor internal consistency)
|
| B. Reliability intraobserver or test-retest | Not Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
Continuous scores: intraclass correlation coefficient (ICC) Dichotomous: Cohen's kappa |
| C. Reliability interobserver or Measurement error | Not Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
Standard Error of Measurement (SEM, Smallest Detectable Change (SDC), Limits of agreement (Bland Altmann plot) or Minimal Detectable Change as % of the maximum score (MDC %) |
| 2. VALIDITY | |
| A. Content validity: face validity | Not Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
Obtained by principal component analysis form 3 other PROs |
| B. Construct Validity: Structural validity |
Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Not Tested |
| Brief Description |
Factor loadings
Core Distress
Pain 0.66 0.16
General Fatigue 0.80 0.05
Morning Fatigue 0.78 0.00
Stiffness 0.82 0.09
Anxiety 0.18 0.72
Depression 0.15 0.71
Trait anxiety 0.15 0.93
|
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
AUC
CoreFM for discriminating :severe/extreme pain = 0.798 (95% CI 07200.875)
DistressFM:anxiety/depression =0.893 (95% CI 0.8360.951)
|