| MEASUREMENT PROPERTIES | |
| Limitations | >=5 European languages (English) |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
Cronbach’s Alpha for the total scale was 0.777, indicating that the scale can be considered internally consistent within our sample, and below 0.9, suggesting that none of the items are redundant |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
No significant differences between responders and nonresponders were found for gender, age, chronicity, pain intensity, disability, depression, pain catastrophization or FreBAQ total score (data not shown). The ICC for agreement was 0.652 (95% CI: 0.307–0.848), and for consistency 0.667 (95% CI: 0.317–0.857). |
| 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 |
Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Tested |
| Brief Description |
Inter-item correlations ranged from 0.269 to 0.731, and item-rest correlations ranged from 0.119 (item nine) to 0.616 (item two). |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
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