Author : A, Kuchimova Ch.
European Journal of Molecular & Clinical Medicine,
2020, Volume 7, Issue 2, Pages 1844-1853
Abstract: The problem of the existence of long-term depressive states is not new:
descriptions of "chronic melancholies" are found in psychiatrists already in the 70 years
of the XIX century. If we look at modern statistics of depression in general, we can see that
not all depressive phases show a tendency to reverse development. In 40% of cases, the
initial phase and a year later still meets the criteria for depression (N. Pincus, 2001), in
20% of cases it lasts for more than 2 years (N. Pincus, 2001) and in 17% of cases,
depression continues throughout life (R. Kessler, 1994).