title: Prevalence of ankylosing spondylitis in males and females in a young middle-aged population of Tromsø, northern Norway.
abstract: In an epidemiological survey in Tromsø, northern Norway a prevalence of definite ankylosing spondylitis (AS) of between 1.1% and 1.4% was found (males: 1.9-2.2% and females: 0.3-0.6%). The ratio of male to female was between 3.9 and 6.1 in favour of the male sex. It was calculated that 6.7% of the B27 positive individuals had AS, and that 22.5% of the B27 positive subjects with back pain or stiffness suffered from AS.
authors.forename: J T
authors.initials: JT
authors.lastname: Gran
authors.forename: G
authors.initials: G
authors.lastname: Husby
authors.forename: M
authors.initials: M
authors.lastname: Hordvik
mesh_terms: D000328:Adult; D000367:Age Factors; D001416:Back Pain / Q000453:epidemiology; D005260:Female; D006680:HLA Antigens / Q000032:analysis; D015796:HLA-B27 Antigen; D006801:Humans; D008297:Male; D008875:Middle Aged; D009664:Norway; D011859:Radiography; D012446:Sacroiliac Joint / Q000000981:diagnostic imaging; D012737:Sex Factors; D013167:Spondylitis, Ankylosing / Q000000981:diagnostic imaging / Q000453:epidemiology* / Q000276:immunology
chemical_list: D006680:HLA Antigens; D015796:HLA-B27 Antigen