| MEASUREMENT PROPERTIES | |
| Limitations | >=5 European languages (English) |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
0.84-0.96 |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
0.86-0.93 Lower with a little interval >2 weeks. |
| C. Reliability interobserver or Measurement error | Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
SEM 3.7-4.1 MDC depends on time interval (3.7-6.9), definition of unchanged patients (2.7-5.8), treatment type (range 5.4-5.6)and baseline scores (5.6-6) |
| 2. VALIDITY | |
| A. Content validity: face validity | Not Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
The RMDQ is limited since it only covers specific physical problems, and not psychological or social problems, for which other scales should be used. Neither floor nor ceiling effects were seen at baseline among workers with recent work-related back injuries |
| 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) |
Correlate moderately to strongly with Quebec, Oswestry, Back pain functional capacity and EuroQol Weak to modest correlations with pain intensity (range 0.26–0.57), physical impairment tests such as the straight-leg raising test, and flexion range of motion |