Depression
Studies have shown 90% of those who complete suicide have a diagnosable mental disorder, most often a depressive and/or substance abuse disorder. Depression is far more intense than a blue mood experienced by most people. The Diagnostic and Statistical Manual of Mental Disorder, 4th Edition (DSM4), identifies criteria for a diagnosis of depression.
Five or more of the following symptoms have been present nearly every day during the same two-week period and represent a change from previous functioning:
- Depressed mood most of the day
- Markedly diminished interest in all or almost all activities most of the day
- Significant weight loss or significant weight gain without attempting to either lose or gain weight. Or, a decrease or increase in appetite
- Insomnia (inability to sleep or stay asleep), or Hypersomnia (need for more sleep than usual)
- Psychomotor agitation or retardation (as noted or observed by others)
- Fatigue or loss of energy
- Feelings of worthlessness or excessive or inappropriate guilt
- Diminished ability to think or concentrate or indecisiveness
- Recurrent thoughts of death, suicidal ideation or a suicide attempt
These symptoms must cause significant distress or impairment in functioning.