The study is a Worldwide Survey on the Understanding of Psoriatic Disease among Patients with Psoriasis and Psoriatic Arthritis.

This is a cross-sectional, quantitative online survey of patients with psoriasis with or without concomitant psoriatic arthritis. Following assessment of participant eligibility via a 5-minute online screener, the 25-minute internet-based survey will be conducted without any follow-up.

Inclusion Criteria:

1. Patients who self-report to have been diagnosed with Psoriasis or Psoriasis and Psoriatic Arthritis before or at the time of data collection
2. Patients 18 years of age or older at the time of data collection
3. Patients who did not participate in surveys regarding Psoriasis or Psoriatic Arthritis in the last 4 weeks
4. Body Surface Area (BSA) of >5 to <10, with psoriasis affecting sensitive and/or prominent body parts: face, palms, hands, fingers, genitals, soles of feet or nails or a BSA of 10 and above, when psoriasis was at its worst

The study population will consist of adults with self-reported Psoriasis and/or Psoriatic Arthritis. Screening questions will be used to determine the eligibility for each respondent to the survey.