Major Depressive Disorder: Symptoms, Causes & Treatment
Major Depressive Disorder (MDD) is a clinical and behavioral disorder that consists of abnormalities that affect mood and functions like appetite and sleep disturbances, cognitive dysfunctions like guilt, low self-esteem, feelings of worthlessness, and psychomotor activity such as agitation. Major Depressive Disorder is classified as a mood disorder. When major depression occurs with a history of hypomanic or manic episodes, then it is classified as Bipolar Disorder. MDD affects women (12%) more than men (12%). The disorder can impair daily functioning.
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Classification of Single Versus Recurrent Major Depressive Disorder
Classification of Major Depressive Disorder (MDD) is done based on many different criteria but is it mostly categorized on the basis of episodes.
- Major Depressive Disorder Single Episode
- Major Depressive Disorder Recurrent Episode
Other classifications include the severity of MDD symptoms into:
Mild | Moderate | Severe
In typical, mild, moderate, or severe depressive episodes the patient suffers from mood swings, decreased energy, and reduced activities.
MAJOR DEPRESSIVE DISORDER SINGLE EPISODE
The depression has to last two weeks or longer where a person experiences major depressive disorder single episode mild, moderate, or severe. Other criteria are if the person has or is experiencing psychotic features.
MAJOR DEPRESSIVE DISORDER RECURRENT EPISODE
The person must be experiencing repeated episodes of depression without any evidence of hypomania or mania. Each episode has to last at least two weeks in duration. It is also categorized by mild, moderate, and severe. The presence of psychotic features is also assessed.
Clinical depression is a depressed mood most of the day. It is commonly seen in the morning along with a loss of interest in normal daily activities. Symptoms can include constant fatigue, feeling worthless, low self-esteem, difficulty making decisions, lack of or excessive sleeping, loss of interest in activities, restlessness, poor appetite, weight loss or weight gain by more than five percent, and suicidal thoughts.
Major Depressive Disorder (MDD) Causes
If there is a history of Major Depressive Disorder (MDD) in close family members, and especially in immediate family members (grandparents, parents), then the risk for a major depressive episode will be three times more likely.
Biological causes such as levels of serotonin, norepinephrine, and dopamine, can cause depression or other symptoms if levels are low.
- Obsession and compulsion due to serotonin deficiency
- Attention and anxiety with low levels of nor-epinephrine
- Attention, motivation, and pleasure with low levels of dopamine
- Other biological factors may include tryptophan deficiency, which the body uses to make serotonin (the happy hormone)
- Loss of someone due to death or divorce
- Sexual or emotional abuse
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Risk Factors of Major Depressive Disorder (MDD)
Major Depressive Disorder (MDD) is not limited to adults and elderly populations. A substantial proportion of patients experience their first episode of major depression during their developmental years.
There are four major risk factors associated with major depression:
- Gender: major depression is higher in females than males
- Poor lifestyle
- Traumatic childhood experience
- Specific personality traits
Studies in the United States showed an estimation of 17% of the population has experienced or is experiencing major depression. Another study found that nearly 5% of the population reported meeting criteria for major depressive disorder in the last 30 days.
Major Depressive Disorder Treatment
Cognitive-behavioral therapy (CBT)
Physical activity and exercise three times a week for 20 minutes even if it is going for a walk.
Eating a healthy and well-balanced diet which helps improve weight issues, hormonal, and neurological health