CRP and rheumatoid arthritis: In addition, the NLR and platelet-to-lymphocyte ratio were investigated in patients with RA, and these levels were found to be correlated with CRP and DAS28 in RA patients.[27] The NLR was also studied in SLE patients, and was shown to be correlated with CRP, ESR, and SLE disease activity index scores.[24] However, there have been no studies addressing the NLR in AOSD patients.