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Ann Rheum Dis 72:715-720 doi:10.1136/annrheumdis-2012-201497
  • Clinical and epidemiological research
  • Extended report

The burden of carotid artery plaques is higher in patients with psoriatic arthritis compared with those with psoriasis alone

  1. Dafna D Gladman1
  1. 1Department of Rheumatology, Centre for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital, University of Toronto Psoriatic Arthritis Program, Toronto, Ontario, Canada
  2. 2Division of Dermatology, Toronto Western Hospital, University of Toronto, Toronto, Ontario, Canada
  1. Correspondence to Professor Dr Dafna D Gladman, Department of Rheumatology, Centre for Prognosis Studies in the Rheumatic Diseases 1E-410B, University of Toronto Psoriatic Arthritis Clinic, Toronto Western Hospital, 399 Bathurst Street, Toronto, Ontario M5T 2S8, Canada; dafna.gladman{at}utoronto.ca
  • Received 8 February 2012
  • Accepted 19 May 2012
  • Published Online First 26 June 2012

Abstract

Aim To compare the extent of atherosclerosis in patients with psoriatic arthritis (PsA) and patients with cutaneous psoriasis without arthritis (PsC).

Methods In this cross-sectional study the authors compared patients with PsA with PsC patients. Psoriasis patients underwent a rheumatological assessment to exclude inflammatory arthritis. Ultrasonographic measurements of carotid total plaque area (TPA) and carotid intima-media thickness (cIMT) were performed. t Test was used to compare the imaging findings between the two groups. Multivariate linear regression analysis was used to assess the association between disease status and imaging findings after adjusting for potential confounders.

Results Overall, 125 PsA and 114 PsC patients were compared. There were no significant differences in age, gender or cardiovascular risk factors between the two groups. Patients with PsA exhibited greater TPA than did PsC patients (TPA (square root of area in mm2) 3.33±3.34 vs 2.43±2.72, p=0.03). This difference remained statistically significant in the multivariate regression analysis after adjusting for potential confounders (p=0.03). The difference in cIMT between the groups did not achieve statistical significance (p=0.09). The following disease-related variables were associated with increase in TPA in multivariate regression analysis among PsA patients: duration of PsA (p=0.04), highest Psoriasis Area and Severity Index recorded in the first 3 years of follow-up (p=0.02) and erythrocyte sedimentation rate (p=0.005).

Conclusions PsA patients suffer from more severe subclinical atherosclerosis compared with patients with PsC. This difference is independent of traditional cardiovascular risk factors and correlates with PsA disease duration, more severe skin disease and increased inflammatory markers.