Objective: To evaluate the prevalence of anti- citrullinated protein antibodies (ACPA) in patients with a variety of rheumatic diseases other than rheumatoid arthritis (RA).
Methods: 144 cases of rheumatic diseases other than rheumatoid arthritis (RA) over a period of 1 year were recruited after consenting and followed up for 2 years. Their serum samples were tested for ACPA.