Could C-Reactive Protein/Albumin Ratio be an Indicator of Activation in Axial Spondyloarthritis?

Abstract

OBJECTIVES\n\xa0To evaluate the relationship of C-reactive protein (CRP)/albumin ratio (CAR), neutrophil/lymphocyte ratio (NLR), platelet/lymphocyte ratio with Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) in axial spondyloarthritis (Ax-SpA).\n\n\nSTUDY DESIGN\nCross-sectional study.\n\n\nPLACE AND DURATION OF STUDY\nClinic of Rheumatology, Dışkapı Education and Research Hospital, Health Sciences University, Turkey during January 2020-2021.\n\n\nMETHODOLOGY\nOne-hundred and nine patients aged >18 years were included. Age, gender, duration of disease, BASDAI scores were recorded. CRP, erythrocyte sedimentation rate (ESR), albumin values, leukocyte, neutrophil, lymphocyte, platelet counts were determined.\n\n\nRESULTS\nThe mean age and median disease duration of the patients were 45.03±10.63 and 5 (2-6.5) years, respectively. Among these, 28 (58.3%) female and 44 (72.1%) male patients were found to be HLA-B27 positive. BASDAI≥ 4 was observed in 61 (56%) patients and <4 in 48 (44%) patients. CRP, albumin, ESR, NLR and CAR values between the patient groups were significantly different. There was high correlation between BASDAI and CAR. There was a moderate correlation between CAR and BASDAI in the patient group with normal acute phase reactants.\n\n\nCONCLUSION\nThere is a significant correlation between CAR value and composite score such as BASDAI, which is commonly used to assess systemic inflammation in Ax-SpA. These methods are reliable, recognised by reimbursement institutions and include measurements that physicians can use practically in routine outpatient clinics. Key Words: Spondylitis, Ankylosing, HLA-B27 antigen, C-reactive protein/metabolism, Serum albumin/metabolism, Neutrophils, Lymphocytes, Platelet count.