CRP and rheumatoid arthritis: Regarding RA-ILD+ patients, men had significantly lower TAng frequencies than women (9.75 ± 4.12 vs. 16.44 ± 5.97, p < 0.01, Table 2), though no relationship was disclosed between these cells and the duration of RA, C-reactive protein (CRP), erytrocyte sedimentation rate (ESR) or PFTs.