Summary of quality of evidence on measurement properties of outcome measurement instruments in PMR.
| Construct validity | Test-retest Reliability | Responsiveness | Thresholds of Meaning | |
|---|---|---|---|---|
| Pain VAS | – | + | – | – |
| Stiffness VAS | N/A | N/A | N/A | N/A |
| Duration of morning stiffness | – | – | – | – |
| HAQ-DI | – | N/A | – | N/A |
| mHAQ | – | + | – | – |
| ESR and CRP | – | N/A | – | + |
Evaluation of evidence defined as N/A: not evaluated; –: evaluated but insufficient evidence to support use in clinical studies; +: evaluated and some evidence to support use; ++: good evidence to support use in clinical studies. CRP: C-reactive protein; ESR: erythrocyte sedimentation rate; HAQ-DI: Health Assessment Questionnaire–Disability Index; mHAQ: modified Health Assessment Questionnaire; PMR: polymyalgia rheumatica; VAS: visual analog scale.