Psoriasis: Test Your Knowledge

Psoriasis affects an estimated 5 to 7 million Americans, according to the National Institutes of Health and the American Academy of Dermatology. Psoriasis is more common in adults than children and affects males and females equally.

Psoriasis affects:

• 1% to 3% of people throughout the world
• About 2% to 3% of people in the United States
• Some cultures more than others. Worldwide, psoriasis is most common in Scandinavia and other parts of northern Europe. It appears to be far less common among Asians and is rare in Native Americans, according to the American Academy of Dermatology.