HLA-DR pattern of Rheumatoid Arthritis in Saudi Arabia

Address reprint requests and correspondence to Dr. Al-Arfaj: P.O. Box 34471, Riyadh 11468, Saudi Arabia. E-mail: asarfaj@ksu.edu.sa. Accepted for publication 2 January 2001. Received 11 June 2000.The association of rheumatoid arthritis (RA) with specific HLA-DR antigens in different populations has been extensively documented.1 HLA-DR4 has been shown to be associated with RA in many previous studies,2"4 however, other studies have shown association of RA with DR1 and/or DR10.5'8 We sought to determine the association of HLA-DR antigens with RA among Saudis