<unk>  symptoms tend to develop after an individual has already had several episodes of depression without psychosis. However, once<unk>  symptoms have emerged, they tend to reappear with each future depressive episode. The prognosis for<unk>  is not considered to be as poor as for schizoaffective disorders or primary<unk>  disorders. Still, those who have experienced a depressive episode with<unk>  features have an increased risk of relapse and suicide compared to those without<unk>  features, and they tend to have more pronounced sleep abnormalities. Family members of those who have experienced<unk>  are at increased risk for both<unk>  and schizophrenia. Most patients with<unk>  report having an initial episode between the ages of 20 and 40. As with other depressive episodes,<unk>  tends to be episodic, with symptoms lasting for a certain amount of time and then subsiding. While<unk>  can be chronic (lasting more than 2 years), most depressive episodes last less than 24 months. A study conducted by Kathleen S. Bingham found that patients receiving appropriate treatment for<unk>  went into "remission". They reported a quality of life similar to that of people without PD.
Psychotic depression
Depression 
Double depression
Collective depression
Retarded depression
Late life depression
Masked depression
Melancholic depression