Chronic Major Depression
Chronic major depression can be diagnosed as a form of Major Depressive Disorder. This specifier applies to the current or most recent Major Depressive Episode in Major Depressive Disorder and to a Major Depressive Episode in Bipolar I or Bipolar II Disorder only if it is the most recent type of mood episode.
The full criteria for a Major Depressive Episode have been met continuously for at least the past 2 years in order for the “Chronic specifier” to be used.
Association, A. (2013). Chronic Major Depression. Psych Central. Retrieved on November 30, 2015, from http://psychcentral.com/lib/chronic-major-depression/