National Mental Health Association, 2001
- Young people and women are at the highest risk for the disorder, but it can affect anyone.
- An estimated 25 percent of the population suffers from mild winter SAD, and about 5 percent suffer from a more severe form of the disorder.
- Three out of four SAD sufferers are women.
- The main age of onset of SAD is between 18 and 30 years of age.
- Seasonal affective disorder is estimated to affect 10 million Americans.