Causes
There are no consistent or pervasive biological links to dysthymia. However, this may be a result of the diverse nature of the disorder. There are some links between dysthymia and possible causes however. "The rate of depression in the families of people with dysthymia is as high as fifty percent for the early-onset form of the disorder". This may indicate that there is some genetic predisposition to dysthymia. Other factors linked with the disorder include: stress, social isolation, or lack of social support.
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