title: Spondylitis is the most common pattern of psoriatic arthritis in Korea.
abstract: We assessed the prevalence and clinical features of psoriatic arthritis (PsA) in Korean patients with psoriasis. The prevalence of PsA in patients with psoriasis was 9%. Patients with PsA were older and had a longer duration of skin disease than those with psoriasis alone (median age, 40 vs 35 years, P = 0.03, and 15.3 vs 11.7 years, P = 0.04, respectively). Spondylitis was the most common pattern of PsA (50%). Nail change, dactylitis, and enthesopathy were observed in 36%, 15.4%, and 15.6% of patients with PsA, respectively. Increased erythrocyte sedimentation rate (ESR), antinuclear antibody, and radiological sacroiliitis were more frequent in patients with PsA than in those with uncomplicated psoriasis (25.8% vs 10.3%, P = 0.04; 37.9% vs 16.7%, P = 0.02; and 37.8% vs 1.1%, P < 0.01, respectively). The onset ages of psoriasis and arthritis in the spondylitis group were significantly lower than those in the non-spondylitis group (median age, 21.5 vs 31 years, P = 0.03, and 28.5 vs 43.5 years, P = 0.01, respectively). HLA-B27 was prevalent in 8% of patients with PsA.
authors.affiliation: Department of Internal Medicine, Seoul National University College of Medicine, Korea.
authors.forename: H J
authors.initials: HJ
authors.lastname: Baek
authors.forename: C D
authors.initials: CD
authors.lastname: Yoo
authors.forename: K C
authors.initials: KC
authors.lastname: Shin
authors.forename: Y J
authors.initials: YJ
authors.lastname: Lee
authors.forename: S W
authors.initials: SW
authors.lastname: Kang
authors.forename: E B
authors.initials: EB
authors.lastname: Lee
authors.forename: C W
authors.initials: CW
authors.lastname: Han
authors.forename: H A
authors.initials: HA
authors.lastname: Kim
authors.forename: J I
authors.initials: JI
authors.lastname: Youn
authors.forename: Y W
authors.initials: YW
authors.lastname: Song
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000974:Antibodies, Antinuclear / Q000097:blood; D015535:Arthritis, Psoriatic / Q000097:blood / Q000453:epidemiology* / Q000503:physiopathology; D001799:Blood Sedimentation; D002648:Child; D005260:Female; D015796:HLA-B27 Antigen / Q000097:blood; D006801:Humans; D007723:Korea / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012217:Rheumatoid Factor / Q000097:blood; D012447:Sacrum; D013166:Spondylitis / Q000097:blood / Q000453:epidemiology* / Q000503:physiopathology
chemical_list: D000974:Antibodies, Antinuclear; D015796:HLA-B27 Antigen; D012217:Rheumatoid Factor