title: [Prognostic factors in the evolution of psoriatic arthritis].
abstract: BACKGROUND
  The aim of this study is to determine the evolution and prognostic factors in the patients with psoriatic arthritis.
  
  
  METHODS
  We have reviewed retrospectively the follow-up of 96 patients with psoriatic arthritis seen in our service. We have collected the following data at onset of the disease: age and sex, age at onset of cutaneous and articular manifestations, clinical form, distal interphalangeal affection, axial involvement, erythrocyte sedimentation rate, rheumatoid factor, antinuclear antibody and HLA antigen. Likewise, we have collected the present functional class. We have correlated the data at onset of the disease with the present functional class.
  
  
  RESULTS
  Mean +/- SD age of 96 patients (48 male, 48 female) was 51 +/- 14 years. The majority of patients (78%) were in ACR functional class I or II. The most frequent clinical form was the oligoarticular (46%), except in the female group, in which the most frequent was the symmetric polyarticular one (46%). We found statistically significant correlation between the present functional class and the clinical form at onset and the disease duration. We didn't found a statistically correlation between the present functional class and the axial involvement.
  
  
  CONCLUSIONS
  Patients with psoriatic arthritis and symmetric polyarthritis are more frequently female, and have a worse prognosis. The axial involvement does not imply a worse prognosis.
authors.affiliation: Servicio de Reumatología, Ciutat Sanitària i Universitària de Bellvitge, L'Hospitalet de Llobregat, Barcelona.
authors.forename: S
authors.initials: S
authors.lastname: Ros Expósito
authors.forename: J
authors.initials: J
authors.lastname: Rodríguez Moreno
authors.forename: C
authors.initials: C
authors.lastname: Gómez Vaquero
authors.forename: E
authors.initials: E
authors.lastname: Campoy Reolid
authors.forename: D
authors.initials: D
authors.lastname: Roig Escofet
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D015535:Arthritis, Psoriatic / Q000175:diagnosis*; D018450:Disease Progression; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D016016:Proportional Hazards Models; D012189:Retrospective Studies; D012737:Sex Factors
vernacular_title: Factores pronósticos de evolución en la artritis psoriásica.