CRP and rheumatoid arthritis: Based on the statistical results of this study, the average BMI of RA patients with the Low CRP group (28.24 ± 6.60 kg/m2) and those with the High CRP group (31.28 ± 7.51 kg/m2) both met the US definition of overweight (BMI of 25 to < 30 kg/m2) (P < 0.05).