Illustrated photo by Roksolana Zasiadko
- SAD affects many people in northern latitudes in winter who live far north or south of the equator
- SAD affects females 4 times more often than males.
- Younger adults have a higher risk of SAD than older adults. SAD has been reported even in children and teens.
- Family history. People with a family history of other types of depression are more likely to develop SAD than people who do not have a family history of depression.
- SAD affects people who already suffer from other types of depression or bipolar disorder. It worsens the symptoms as the winter season comes.