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  2. Major depressive disorder - Wikipedia

    en.wikipedia.org/wiki/Major_depressive_disorder

    163 million (2017) [ 8] Major depressive disorder ( MDD ), also known as clinical depression, is a mental disorder [ 9] characterized by at least two weeks of pervasive low mood, low self-esteem, and loss of interest or pleasure in normally enjoyable activities. Introduced by a group of US clinicians in the mid-1970s, [ 10] the term was adopted ...

  3. Major depressive episode - Wikipedia

    en.wikipedia.org/wiki/Major_depressive_episode

    A major depressive episode ( MDE) is a period characterized by symptoms of major depressive disorder. Those affected primarily exhibit a depressive mood for at least two weeks or more, and a loss of interest or pleasure in everyday activities. Other symptoms can include feelings of emptiness, hopelessness, anxiety, worthlessness, guilt ...

  4. Recurrent brief depression - Wikipedia

    en.wikipedia.org/wiki/Recurrent_brief_depression

    Recurrent brief depression (RBD) defines a mental disorder characterized by intermittent depressive episodes, not related to menstrual cycles in women, occurring between approximately 6–12 times per year, over at least one year or more fulfilling the diagnostic criteria for major depressive episodes (DSM-IV and ICD-10) except for duration in which RBD is less than 14 days (typically 5–7 ...

  5. Mood disorder - Wikipedia

    en.wikipedia.org/wiki/Mood_disorder

    A mood disorder, also known as an affective disorder, is any of a group of conditions of mental and behavioral disorder [ 2] where a disturbance in the person's mood is the main underlying feature. [ 3] The classification is in the Diagnostic and Statistical Manual of Mental Disorders (DSM) and International Classification of Diseases (ICD).

  6. Differential diagnoses of depression - Wikipedia

    en.wikipedia.org/wiki/Differential_diagnoses_of...

    Depression, one of the most commonly diagnosed psychiatric disorders, is being diagnosed in increasing numbers in various segments of the population worldwide. Depression in the United States alone affects 17.6 million Americans each year or 1 in 6 people. Depressed patients are at increased risk of type 2 diabetes, cardiovascular disease and suicide. W

  7. Endogenous depression - Wikipedia

    en.wikipedia.org/wiki/Endogenous_depression

    Endogenous depression. Endogenous depression (melancholia) is an atypical subclass of major depressive disorder (clinical depression). It could be caused by genetic and biological factors. [1] Endogenous depression occurs due to the presence of an internal (cognitive, biological) stressor instead of an external (social, environmental) stressor. [2]

  8. Depressive disorder not otherwise specified - Wikipedia

    en.wikipedia.org/wiki/Depressive_Disorder_Not...

    "Depression" refers to a spectrum of disturbances in mood that vary from mild to severe and from short periods to constant illness. [1] DD-NOS is diagnosed if a patient's symptoms fail to meet the criteria more common depressive disorders such as major depressive disorder or dysthymia. Although DD-NOS shares similar symptoms to dysthymia ...

  9. Treatment-resistant depression - Wikipedia

    en.wikipedia.org/wiki/Treatment-resistant_depression

    Self-harm, suicide. Treatment-resistant depression (TRD) is major depressive disorder in which an affected person does not respond adequately to at least two different antidepressant medications at an adequate dose and for an adequate duration. [1] Inadequate response has most commonly been defined as less than 25% reduction in depressive ...