Assessment of two screening tools to identify psoriatic arthritis in patients with psoriasis.

L C Coates, L J Savage, H Chinoy, P M Laws, C R Lovell, E Korendowych, F Mahmood, H R Mathieson, D McGonagle, R B Warren, R Waxman, P S Helliwell

Research output: Contribution to journalArticlepeer-review

43 Downloads (Pure)

Abstract

Background
Many patients with psoriasis have undiagnosed psoriatic arthritis. Low specificity is found with many PsA screening tools. A new instrument, the CONTEST questionnaire, was developed utilising the most discriminative items from existing instruments.

Objective
The aim of this study was to compare the CONTEST and PEST screening tools.

Methods
People attending secondary care clinics with psoriasis, but not PsA, completed the questionnaires, were assessed for function and quality of life, and had a physical examination. Patients thought to have PsA were compared to those without. The performance of CONTEST and PEST were compared using area under the receiver operating curve (AUC), and sensitivity and specificity at the previously published cut-offs.

Results
451 dermatology patients were approached, 35% were reviewed, and 27 (17%, 95% CI 12.3 – 21.7) had unidentified psoriatic arthritis. The sensitivity and specificity (95% CI) of PEST were 0.60 (0.42 – 0.78)/0.76 (0.69 – 0.83) and for CONTEST 0.53 (0.34 – 0.72)/0.71 (0.63 – 0.79). The confidence limits for the AUC overlapped (AUC for PEST 0.72 (0.61 – 0.84), for CONTEST 0.66 (0.54 – 0.77).

Conclusions
PEST and CONTEST questionnaires performed equally well, with no superiority of the new CONTEST tool.
Original languageEnglish
JournalJournal of the European Academy of Dermatology and Venereology
Early online date26 Mar 2018
DOIs
Publication statusPublished - 2018

Keywords

  • screening
  • psoriasis
  • psoriatic arthritis
  • diagnosis

Fingerprint

Dive into the research topics of 'Assessment of two screening tools to identify psoriatic arthritis in patients with psoriasis.'. Together they form a unique fingerprint.

Cite this