title: Screening for Psoriatic Arthritis in Korean Psoriasis Patients Using the Psoriatic Arthritis Screening Evaluation Questionnaire.
abstract: BACKGROUND
  Psoriatic arthritis (PsA) is chronic seronegative inflammatory arthritis that causes irreversible joint damage. Early recognition of PsA in patients with psoriasis is important for preventing physical disability and deformity. However, diagnosing PsA in a busy dermatology outpatient clinic can be difficult.
  
  
  OBJECTIVE
  This study aimed to validate the Psoriatic Arthritis Screening and Evaluation (PASE) questionnaire for the detection of PsA in Korean patients with psoriasis.
  
  
  METHODS
  The PASE questionnaire was prospectively given to 148 patients diagnosed with psoriasis but without a previous diagnosis of PsA. All patients underwent radiologic and laboratory examinations, and a subsequent clinical evaluation by a rheumatologist.
  
  
  RESULTS
  Eighteen psoriasis patients (12.2%) were diagnosed with PsA according to the Classification Criteria for Psoriatic Arthritis. The PASE questionnaire scores of differed significantly between PsA and non-PsA patients. Receiver operator characteristic analysis showed an area under the curve of 0.82 (95% confidence interval: 0.72, 0.92) for PASE score. A PASE score cut-off of 37 points had a sensitivity of 77.8% and specificity of 82.3% for the diagnosis of PsA.
  
  
  CONCLUSIONS
  The PASE questionnaire is a simple and convenient screening tool for detecting PsA in Korean dermatology clinics. A PASE questionnaire score of 37 points appears to be an appropriate cut-off for screening Korean psoriasis patients.
authors.affiliation: Department of Dermatology, Pusan National University School of Medicine, Busan, Korea.
authors.forename: Hyang-Suk
authors.initials: HS
authors.lastname: You
authors.affiliation: Department of Dermatology, Pusan National University Yangsan Hospital, Yangsan, Korea.
authors.forename: Gun-Wook
authors.initials: GW
authors.lastname: Kim
authors.affiliation: Department of Dermatology, Pusan National University Yangsan Hospital, Yangsan, Korea.
authors.forename: Hyun-Ho
authors.initials: HH
authors.lastname: Cho
authors.affiliation: Department of Dermatology, Pusan National University School of Medicine, Busan, Korea.
authors.forename: Won-Jeong
authors.initials: WJ
authors.lastname: Kim
authors.affiliation: Department of Dermatology, Pusan National University Yangsan Hospital, Yangsan, Korea.
authors.forename: Je-Ho
authors.initials: JH
authors.lastname: Mun
authors.affiliation: Department of Dermatology, Pusan National University School of Medicine, Busan, Korea.
authors.forename: Margaret
authors.initials: M
authors.lastname: Song
authors.affiliation: Department of Dermatology, Pusan National University School of Medicine, Busan, Korea.
authors.forename: Hoon-Soo
authors.initials: HS
authors.lastname: Kim
authors.affiliation: Department of Dermatology, Pusan National University Yangsan Hospital, Yangsan, Korea.
authors.forename: Hyun-Chang
authors.initials: HC
authors.lastname: Ko
authors.affiliation: Department of Dermatology, Pusan National University School of Medicine, Busan, Korea. ; Biomedical Research Institute, Pusan National University Hospital, Busan, Korea.
authors.forename: Moon-Bum
authors.initials: MB
authors.lastname: Kim
authors.affiliation: Department of Rheumatology, Pusan National University, Busan, Korea.
authors.forename: Seung-Geun
authors.initials: SG
authors.lastname: Lee
authors.affiliation: Department of Diagnostic Radiology, Pusan National University, Busan, Korea.
authors.forename: In-Sook
authors.initials: IS
authors.lastname: Lee
authors.affiliation: Department of Dermatology, Pusan National University School of Medicine, Busan, Korea. ; Biomedical Research Institute, Pusan National University Hospital, Busan, Korea.
authors.forename: Byung-Soo
authors.initials: BS
authors.lastname: Kim
keywords: Psoriatic arthritis; Questionnaires; Screening