The electronic Psoriasis and Arthritis Screening Questionnaire (ePASQ): a sensitive and specific tool to diagnose psoriatic arthritis patients

J Cutan Med Surg. May-Jun 2011;15(3):143-9. doi: 10.2310/7750.2011.10018.


Background: We report on an electronic version of the Psoriatic Arthritis Screening Questionnaire (ePASQ), a sensitive and specific tool for diagnosis of psoriatic arthritis (PsA) in patients with plaque psoriasis.

Objective: To validate the ePASQ against the original paper version.

Method: The ePASQ scores 15 points on 10 weighted questions and a 68-joint diagram. Data were collected from a prospective cohort of 42 patients with early PsA meeting the Classification Criteria for Psoriatic Arthritis (CASPAR) criteria and from 12 plaque psoriasis patients without PsA.

Results: The receiver operating characteristic curves for the ePASQ group yielded an optimal 97.62% sensitivity and 75.00% specificity, for a cutoff score of 7. A cutoff point of 8 yielded 88.10% sensitivity and 75.00% specificity. Concordance of the paper and electronic scores was very high.

Conclusion: The ePASQ is a sensitive and specific tool to screen for PsA. The simple electronic administration and automatic scoring minimize clinician involvement and increase the potential for wider distribution.

Publication types

  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Adult
  • Arthritis, Psoriatic / diagnosis*
  • Female
  • Humans
  • Male
  • Mass Screening / methods*
  • Middle Aged
  • Prospective Studies
  • ROC Curve
  • Sensitivity and Specificity
  • Surveys and Questionnaires*