- According to current studies, more than 8 million Americans have psoriasis.
- 125 million people worldwide—2 to 3 percent of the total population—have psoriasis, according to the World Psoriasis Day consortium.
- Studies show that between 10 and 30 percent of people with psoriasis also develop psoriatic arthritis.
- Psoriasis prevalence in African Americans is 1.3 percent compared to 2.5 percent of Caucasians.1
Quality of life
- Psoriasis is not a cosmetic problem. Nearly 60 percent of people with psoriasis reported their disease to be a large problem in their everyday life.2
- Nearly 40 percent with psoriatic arthritis reported their disease to be a large problem in everyday life.3
- Patients with moderate to severe psoriasis experienced a greater negative impact on their quality of life.4
- Psoriasis has a greater impact on quality of life in women and younger patients.4
Age of onset
- Psoriasis often appears between the ages of 15 and 25, but can develop at any age.
- Psoriatic arthritis usually develops between the ages of 30 and 50, but can develop at any age.
Severity of psoriasis
- The National Psoriasis Foundation defines mild psoriasis as affecting less than 3 percent of the body; 3 percent to 10 percent is considered moderate; more than 10 percent is considered severe. For most individuals, your hand is about the same as 1 percent of the skin surface. However, the severity of psoriasis is also measured by how psoriasis affects a person's quality of life.
- Nearly one-quarter of people with psoriasis have cases that are considered moderate to severe.
Cost of psoriasis
- Patients with psoriasis incur annual health care costs that are significantly greater than those of the general population and may amount to $135 billion annually (2013 US $).5
- In the United States, the economic burden of psoriasis is substantial because this disease results in considerable negative physical, psychiatric, and social consequences.5
Genetic aspects of psoriasis
- About one out of three people with psoriasis report having a relative with psoriasis.
- If one parent has psoriasis, a child has about a 10 percent chance of having psoriasis. If both parents have psoriasis, a child has approximately a 50 percent chance of developing the disease.
1. Gelfand JM, Stern RS, Nijsten T, Feldman SR, Thomas J, Kist J, Rolstad T, Margolis DJ. The prevalence of psoriasis in African Americans: results from a population-based study. J Am Acad Dermatol. 2005 Jan;52(1):23-6.M
2. Stern RS, Nijsten T, Feldman SR, Margolis DJ, Rolstad T. Psoriasis is common, carries a substantial burden even when not extensive, and is associated with widespread treatment dissatisfaction. J Investig Dermatol Symp Proc. 2004 Mar;9(2):136-9.
3. Gelfand JM, Gladman DD, Mease PJ, Smith N, Margolis DJ, Nijsten T, Stern RS, Feldman SR, Rolstad T. Epidemiology of psoriatic arthritis in the population of the United States. J Am Acad Dermatol. 2005 Oct;53(4):573.
4. Gelfand JM, Feldman SR, Stern RS, Thomas J, Rolstad T, Margolis DJ. Determinants of quality of life in patients with psoriasis: a study from the U.S. population. J Am Acad Dermatol. 2004 Nov;51(5):704-8.
5. Brezinski EA, Dhillon JS, Armstrong AW. Economic Burden of Psoriasis in the United States: A Systematic Review. JAMA Dermatol. 2015 Jun;151(6):651-8. doi:10.1001/jamadermatol.2014.3593. Review. PubMed PMID: 25565304.