Demonstration of the domains contained in various response criteria in comparison with the variables loading best in the principal component analysis
| Response criteria | ||||
|---|---|---|---|---|
| Two highest loading variables per component | PsARC | ACR | EULAR | |
| Component I: Patient self-reported disease activity | VAS PtGA | + | + | + |
| VAS PAIN | − | + | − | |
| Component II: Joint counts | 66 SJC | + | + | −* |
| 68 TJC | + | + | −* | |
| Component III: Acute phase reactants | CRP | − | − | |
| ESR | − | + either/or | + | |
↵* Based on 28 joint counts.
ACR, ACR response criteria; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; EULAR, EULAR response criteria; PsARC, Psoriatic Arthritis Response Criteria; SJC, swollen joint count; TJC, tender joint count; VAS PAIN, visual analogue scale patient pain assessment; VAS PtGA, visual analogue scale patient global disease activity assessment.