Undifferentiated spondyloarthritis is more frequently seen in women than in men

[1] Rojas-Vargas M(2009)First signs and symptoms of spondyloarthritis — data from an inception cohort with a disease course of two years or less (REGISPONSER-Early) Rheumatology (Oxford) 48 404-409

[2] Muñoz-Gomariz E(2008)Prevalence of ankylosing spondylitis and related spondyloarthritides in an urban area of Izmir, Turkey J Rheumatol 35 305-309

[3] Escudero A(2005)The current concept of spondyloarthritis with special emphasis on undifferentiated spondyloarthritis Rheumatology (Oxford) 44 1483-1491

[4] Font P(2009)The development of Assessment of SpondyloArthritis international Society classification criteria for axial spondyloarthritis (part II): validation and final selection Ann Rheum Dis 68 777-783

[5] Zarco P(1984)Evaluation of diagnostic criteria for ankylosing spondylitis A proposal for modification of the New York criteria. Arthritis Rheum 27 361-368

[6] Almodovar R(1991)The European Spondylarthropathy Study Group preliminary criteria for the classification of spondylarthropathy Arthritis Rheum 34 1218-1227

[7] Onen F(1990)Criteria of the classification of spondylarthropathies Rev Rhum Mal Osteoartic 57 85-89

[8] Akar S(2011)The Assessment of SpondyloArthritis International Society classification criteria for peripheral spondyloarthritis and for spondyloarthritis in general Ann Rheum Dis 70 25-31

[9] Birlik M(2010)From retrospective analysis of patients with undifferentiated spondyloarthritis (SpA) to analysis of prospective cohorts and detection of axial and peripheral SpA J Rheumatol 37 1091-1095

[10] Sari I(2010)Undifferentiated spondyloarthritis: recent clinical and therapeutic advances Curr Rheumatol Rep 12 311-317

[1] Rojas-Vargas M(2009)First signs and symptoms of spondyloarthritis — data from an inception cohort with a disease course of two years or less (REGISPONSER-Early) Rheumatology (Oxford) 48 404-409

[2] Muñoz-Gomariz E(2008)Prevalence of ankylosing spondylitis and related spondyloarthritides in an urban area of Izmir, Turkey J Rheumatol 35 305-309

[3] Escudero A(2005)The current concept of spondyloarthritis with special emphasis on undifferentiated spondyloarthritis Rheumatology (Oxford) 44 1483-1491

[4] Font P(2009)The development of Assessment of SpondyloArthritis international Society classification criteria for axial spondyloarthritis (part II): validation and final selection Ann Rheum Dis 68 777-783

[5] Zarco P(1984)Evaluation of diagnostic criteria for ankylosing spondylitis A proposal for modification of the New York criteria. Arthritis Rheum 27 361-368

[6] Almodovar R(1991)The European Spondylarthropathy Study Group preliminary criteria for the classification of spondylarthropathy Arthritis Rheum 34 1218-1227

[7] Onen F(1990)Criteria of the classification of spondylarthropathies Rev Rhum Mal Osteoartic 57 85-89

[8] Akar S(2011)The Assessment of SpondyloArthritis International Society classification criteria for peripheral spondyloarthritis and for spondyloarthritis in general Ann Rheum Dis 70 25-31

[9] Birlik M(2010)From retrospective analysis of patients with undifferentiated spondyloarthritis (SpA) to analysis of prospective cohorts and detection of axial and peripheral SpA J Rheumatol 37 1091-1095

[10] Sari I(2010)Undifferentiated spondyloarthritis: recent clinical and therapeutic advances Curr Rheumatol Rep 12 311-317