How Common Is Psoriasis Worldwide?

An analysis of 53 studies suggests higher prevalence north of the equator, in lighter-skinned populations, and in older people.

Genetic and environmental factors contribute to the complex pathogenesis of psoriasis. To better understand the burden of psoriasis worldwide, these researchers conducted a systematic review of the published literature, with an eye to how variables such as geographic location, gender, and age affect incidence and prevalence, and how variations in study design and definition of cases and prevalence affect epidemiology of the disease. They limited their analysis to rates in the general population, including 46 studies examining prevalence and 7 evaluating incidence.

In the U.S., prevalence ranged from 2.2% to 3.15%; in the U.K., the range was 1.3% to 2.6%. Prevalence rates were higher in southern and northeastern Europe than in the U.K. Closer…

Reviewing Author

Craig A. Elmets, MD

Disclosures

Consultant / Advisory board Astellas Pharmaceuticals

EquityVaxin

Grant / Research support NIH; NIH/NCI; Veteran’s Administration; Ferndale Laboratories; Kyowa Hakko Kirin Pharma, Inc.

Editorial boards Cancer Prevention Research; Photodermatology, Photoimmunology, & Photomedicine; UpToDate; eMedicine; Journal of Dermatological Sciences; JAMA Dermatology

Leadership positions in professional societies American Academy of Dermatology (Vice Chair, Committee on Science and Research); Photomedicine Society (Board of Directors)