| MEASUREMENT PROPERTIES | |
| Limitations | |
| Observations |
Paper and Digital Formats available through ePROVIDE MAPI Trust |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
Cronbach's alpha= 0.71-0.87 |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
ICC= 0.84, 95% confidence interval 0.73–0.91 |
| C. Reliability interobserver or Measurement error | Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
Minimal detectable change is 13.7–19 |
| 2. VALIDITY | |
| A. Content validity: face validity | Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
The ODI has adequate content validity, as it covers activities of daily living that are commonly experienced by patients with back pain. However, it lacks generic activities such as work, leisure, recreation, or sporting activities. |
| B. Construct Validity: Structural validity |
Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Tested |
| Brief Description |
The ODI was compared with four states of general health. The scores showed a slight linear decrease where general health was lower. Independent relationship of pain and function were investigated against the ODI with linear regression models. |
| C. Criterion validity | Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
Pain NRS, and the Short Form 36. The ODI moderately correlated with the SF-36 and NRS (Spearman's and Pearson's correlation coefficients of >0.30). |