MAJOR DEPRESSIVE DISORDER
Twice as common in women and more common in single or divorced people
Involves 2 or more weeks of sad mood, lack of interest in life activities, and at least four other symptoms:
Changes in appetite or weight, sleep, or psychomotor activity
Feelings of worthlessness or guilt
Difficulty thinking, concentrating, or making decisions
Recurrent thoughts of death or suicidal ideation, plans, or attempts