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Classification by aetiology

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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In general classification according to aetiology is of little clinical use. The main concepts are:

  • endogenous depression:
    • the cause of the depression is independent of external factors

  • reactive depression:
    • depression is a reaction to external stressors or events

  • primary depression:
    • depression is the primary disorder and not caused by other disorders such as schizophrenia or substance abuse

  • secondary depression:
    • depression is secondary to some other disorder such as schizophrenia, alcoholism, dementia etc

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