CRP and rheumatoid arthritis: Mean CRP levels significantly decreased in RA patients from 23.5 mg/l (± 33.6; 95% CI: 9.9–37.1) to 2.7 mg/L (± 3.4; 95% CI: 1.0-4.3), and in PsA patients from 13.3 mg/L (± 18.0; 95% CI: 5.7–20.9) to 8.1 mg/L (± 16.2; 95% CI: 0.1–16.2) (p < .001).