Three new inflammatory markers C reactive protein to albumin ratio, neutrophil to lymphocyte ratio, and platelet to lymphocyte ratio correlated with relapsing polychondritis disease activity index.

The novel inflammatory markers CAR, NLR and PLR were associated with RPDAI. Key Points • This is the first research to explore the association of CAR, NLR, and PLR with disease activity in patients with RP • CAR, NLR, and PLR are positively correlated with RPDAI • CAR, NLR, and PLR might be the potential predictors of disease activity in RP.