Medical conditions
Some examples of chronic illnesses that may cause depression are
diabetes, heart disease, arthritis, kidney disease, HIV and AIDS, lupus, and multiple sclerosis (MS).
Hypothyroidism may also lead to depressed feelings.
Personality
- Among the big five personality traits,
- conscientiousness is one of the two strongest predictors of depression,
- second only to neuroticism.
Low conscientiousness leads to a more disorganized and poorly planned life, creating more stressful life circumstances and higher levels of depression.
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