ICC for different CRP measurement methods and disease activity scores
| ICC | 95% CI | |
| Routine laboratory CRP and qCRP (n=104) | 0.980 | (0.969 to 0.986) |
| DAPSA and Q-DAPSA (n=104) | 1.000 | (0.999 to 1.000) |
| DAPSA and cDAPSA (n=104) | 0.995 | (0.992 to 0.997) |
Model: two-way mixed-effects model. Type: multiple measurements. Definition: absolute agreement.
cDAPSA, clinical DAPSA; CRP, C reactive protein; DAPSA, Disease Activity index for PSoriatic Arthritis; ICC, intraclass correlation coefficient; qCRP, quick quantitative CRP; Q-DAPSA, DAPSA calculated with a qCRP assay.