What is the prevalence of psoriasis in the USA?

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What is the prevalence of psoriasis in the USA?

Psoriasis is a relatively common chronic skin condition in the United States. Here’s an overview of its prevalence:

1. General Prevalence

Estimated Prevalence: Psoriasis affects approximately 2-3% of the U.S. population. This means that about 7.5 to 8 million Americans are living with psoriasis.
Age of Onset: Psoriasis can develop at any age, but it commonly appears in two age peaks: between the ages of 15 and 30, and between 50 and 60. However, it can occur at any age, including in childhood.

2. Gender and Ethnicity

Gender Distribution: Psoriasis affects men and women at similar rates, though some studies suggest that men might be slightly more affected than women.
Ethnic Variations: Psoriasis prevalence varies among different ethnic groups. It is more common in Caucasians than in African Americans, Asians, or Hispanics. For example, the prevalence in Caucasians is around 3.6%, compared to about 1.9% in African Americans.

3. Psoriatic Arthritis

Prevalence Among Psoriasis Patients: Around 10-30% of people with psoriasis will develop psoriatic arthritis, an inflammatory condition that affects the joints and can lead to significant pain and disability.

4. Severity Distribution

Mild to Moderate Cases: The majority of psoriasis cases (about 70-80%) are classified as mild to moderate, where less than 10% of the body surface area is affected.
Severe Cases: About 20-30% of people with psoriasis have moderate to severe cases, where more than 10% of the body surface area is affected or the disease significantly impacts quality of life.

5. Economic and Healthcare Impact

Healthcare Costs: Psoriasis contributes to a significant economic burden due to the costs of medical care, lost productivity, and the psychological impact of the disease. The total annual direct cost of managing psoriasis in the U.S. is estimated to be in the billions of dollars.
Comorbidities: Psoriasis is associated with an increased risk of several comorbid conditions, including cardiovascular disease, metabolic syndrome, depression, and diabetes, which can further impact healthcare costs and patient outcomes.

Summary

Psoriasis affects approximately 2-3% of the U.S. population, translating to about 7.5 to 8 million individuals. It is a common condition that affects people of all ages, with two main peaks in onset during young adulthood and later in life. While the prevalence is similar between men and women, it is more common among Caucasians than other ethnic groups. Psoriasis can range from mild to severe and is often associated with other health conditions, highlighting the importance of comprehensive management.