1) According to the DSM 5 depression is said to be present when 5 or more symptoms are existent during a 2 week period and represents a change from previous functioning or state of being, where at least one symptom is either 1) depressed mood or 2) loss of interest or pleasure.
- Having a depressed mood most of the day, nearly everyday indicated by feelings of sadness, emptiness or hopelessness or observations made by others whereby the individual appears tearful or in an irritable mood.
- A noticeable diminished interest in most activities most of the day nearly every day.
- Significant weight loss when not dieting or weight gain, decrease in appetitite most days.
- Insomnia or hypersomnia most days.
- Experiencing fatigue or loss of energy most days.
- Psychomotor agitation or retardation that is observable by others, most days.
- Diminished ability to think or concentrate or indecisiveness most days.
- Having recurrent thoughts of death, suicidal ideation without a specific plan or a suicide attempt or a specific plan for committing suicide.
2) The symptoms cause significant distress or impairment in social and other areas of functioning.
3) These symptoms cannot be attributed to the physiological effects of a substance or another medical condition.