Psoriasis incidence and prevalence are higher in the multiple sclerosis (MS) population than in a matched population, a recent study found. Researchers used population-based administrative data to identify 4,911 persons with MS and 23,274 age- , sex- , and geographically-matched controls aged ≥20 years from 1998 through 2008. They found:
- In 2008, the crude incidence of psoriasis per 100,000 person-years was 466.7 in the MS population, and 221.3 in the matched population.
- The crude prevalence of psoriasis per 100,000 persons was 4,666.1 in the MS population, and 3,313.5 in the matched population.
- The incidence and prevalence of psoriasis rose slightly over time.
- After adjusting for sex, age at the index date, socioeconomic status, and physician visits, the risk of incident psoriasis was 54% higher in the MS population.
Marrie RA, Patten SB, Tremlett H, Wolfson C, Leung S, Fisk JD. Increased incidence and prevalence of psoriasis in multiple sclerosis. Mult Scler Relat Disord. 2017;13:81-86. doi:10.1016/j.msard.2017.02.012.