Combined diagnostic value of rheumatoid arthritis-specific citrullinated protein, haemoglobin-to-red cell distribution width ratio, and anti-CCP antibody in rheumatoid arthritis

RA-CP and HRR were identified as independent predictors of RA, including RA-CP as a risk factor for RA and HRR as a protective factor for RA. Combined detection of RA-CP, HRR, and anti-CCP antibody could enhance the accuracy and sensitivity of laboratory diagnosis. Although MPV/PC did not demonstrate significant independent predictive value in this study, this represents the first exploration of its potential clinical role in RA.