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.
SOURCES: National Institutes of Health. Habif TP, et al. (2005). Psoriasis
and other papulosquamous diseases. In Skin Disease: Diagnosis and Treatment,
pp. 106–115. Philadelphia: Elsevier Mosby. Stern DK, Lebwohl MG (2005).
Papulosquamous eruptions. In RE Rakel, ET Bope, eds., Conn's Current Therapy,
pp. 906–914. Philadelphia: Elsevier Saunders. Abel E, Lebwohl M (2005).
Psoriasis. In DC Dale, DD Federman, eds., ACP Medicine, section 2, chap. 3. New