What Is Scalp Psoriasis?
5. Statistics
Based on the National Institutes of Health (NIH), about 2.2% of the population in the United States has psoriasis. Globally, the incidence varies based on the location. In a study involving 26,000 South American Indians, there was no psoriasis case while an incidence of 2.8% of psoriasis was observed in the Faeroe Islands. Overall, about 2% to 3% of the global population are affected by psoriasis.
Although this condition can occur at any age, there is a bimodal peak between the ages of 20 to 30 and 50 to 60 years old. It is estimated that about 10% to 15% of new cases occur in pediatric patients younger than 10. Psoriasis seems to affect women more than men. Some believe that the incidence is dependent on the genetic heritage and climate of the population.
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