- Psoriasis is the most prevalent autoimmune disease in the U.S.
- According to current studies, as many as 7.5 million Americans—approximately
2.2 percent of the population--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
- Total direct and indirect health care costs of psoriasis for patients are calculated at $135 billion annually in the U.S., or up to $26,000 per person.5 Direct costs, which include the cost of treatment and doctor's visits, can be as high as $8,000 each year per person.5 The cost of coping with comorbidities, such as diabetes, heart disease and depression, reaches almost $5,000 per person annually.5
- Indirect costs, which take into account absences from work, or lost productivity on the job due to psoriasis, were estimated to be upwards of $4,000 per person annually—or as much as $35.4 billion for the nation.5
- Approximately 60 percent of psoriasis patients missed an average of 26 days of work a year due to their illness.6
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.
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. The economic burden of psoriasis in the United States. J Am Acad Dermatol. 2015 Jan;10.1001.
6. Horn EJ, Fox KM, Patel V, Chiou CF, Dann F, Lebwohl M. Association of patient reported psoriasis severity with income and employment. J Am Acad Dermatol. 2007 Aug; 57(6):963-71.