title: The performance of psoriatic arthritis classification criteria in Turkish patients with psoriatic arthritis.
abstract: OBJECTIVE
  To investigate performance of some of the published psoriatic arthritis (PsA) classification criteria as well as Assessment of Spondyloarthritis International Society (ASAS) criteria for peripheral spondyloarthritis (SpA) in Turkish patients with PsA (in early and late disease subgroups).
  
  
  METHODS
  Patients were recruited using case report forms and physical examination methods proposed by the Anatolian Group for the Assessment in Rheumatic Diseases (ANGARD). The Moll and Wright (MW), modified Fournie (MF), modified McGonagle (mMG), Vasey and Espinoza (VE), classification of PsA (CASPAR) criteria and ASAS criteria were assessed in patients with PsA who were diagnosed based on expert opinion.
  
  
  RESULTS
  One hundred and twenty-eight patients with PsA (58 male, 70 female, mean age 41.8 years) were included. Thirty patients were in the early PsA and 98 patients were in the late PsA groups. Diagnostic delay was 2.6 years. In the 15.6% of patients arthritis developed before the skin findings. The proportion of patients fulfilling the MW, MF, mMG, VE, CASPAR and ASAS criteria were at a ratio of 90.6%, 82.8%, 62.5%, 84.4%, 96.1% and 76.5%, respectively. In early PsA (< 12 months disease duration) the proportions were 93.4%, 83.3%, 76.7%, 76.7%, 96.7% and 66.6%, respectively. On the other hand, in late PsA the proportions were 89.8%, 82.6%, 57.1%, 86.7%, 95.9%, 79.5%, respectively.
  
  
  CONCLUSIONS
  Even though the sensitivity of PsA classification criteria in Turkish patients changes, the CASPAR criteria seems to be more prominent among all criteria for both early and late cases with its high sensitivity.
authors.affiliation: Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Dicle University, Diyarbakir, Turkey.
authors.forename: Kemal
authors.initials: K
authors.lastname: Nas
authors.affiliation: Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey.
authors.forename: Murat
authors.initials: M
authors.lastname: Karkucak
authors.affiliation: Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Inönü University, Malatya, Turkey.
authors.forename: Bekir
authors.initials: B
authors.lastname: Durmuş
authors.affiliation: Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Dicle University, Diyarbakir, Turkey.
authors.forename: Mehmet Ali
authors.initials: MA
authors.lastname: Ulu
authors.affiliation: Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Atatürk University, Erzurum, Turkey.
authors.forename: Saliha
authors.initials: S
authors.lastname: Karatay
authors.affiliation: Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey.
authors.forename: Erhan
authors.initials: E
authors.lastname: Çapkin
authors.affiliation: Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Firat University, Elazig, Turkey.
authors.forename: Hasan
authors.initials: H
authors.lastname: Ulusoy
authors.affiliation: Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Firat University, Elazig, Turkey.
authors.forename: Arif
authors.initials: A
authors.lastname: Gülkesen
authors.affiliation: Department of Dermatology, Faculty of Medicine, Dicle University, Diyarbakir, Turkey.
authors.forename: Bilal
authors.initials: B
authors.lastname: Sula
authors.affiliation: Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Firat University, Elazig, Turkey.
authors.forename: Gürkan
authors.initials: G
authors.lastname: Akgöl
authors.affiliation: Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Dicle University, Diyarbakir, Turkey.
authors.forename: Remzi
authors.initials: R
authors.lastname: Çevik
authors.affiliation: Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Erciyes University, Kayseri, Turkey.
authors.forename: Salih
authors.initials: S
authors.lastname: Özgöçmen
mesh_terms: D000328:Adult; D015535:Arthritis, Psoriatic / Q000145:classification / Q000175:diagnosis*; D057210:Delayed Diagnosis; D005260:Female; D006304:Health Status; D006305:Health Status Indicators; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011379:Prognosis; D012720:Severity of Illness Index; D013997:Time Factors; D014421:Turkey
keywords: classification criteria; early arthritis; psoriatic arthritis; spondyloarthritis