CRP and rheumatoid arthritis: Fatigue was prevalent among RA patients and showed negative correlations with inflammatory markers (ESR: r = −0.285, p < 0.01; CRP: r = −0.232, p < 0.01) and disease activity indices (DAS28: r = −0.330, p < 0.01; RAPID3: r = −0.475, p < 0.01).