This is a disorder occurring in the involutional period and characterized by worry, anxiety, agitation, and severe insomnia. Feelings of guilt and somatic preoccupations are frequently present and may be of delusional proportions. This disorder is distinguishable from Manic-depressive illness by the absence of previous episodes; it is distinguished from Schizophrenia in that impaired reality testing is due to a disorder of mood; and it is distinguished from Psychotic depressive reaction in that the depression is not due to some life experience. Opinion is divided as to whether this psychosis can be distinguished from the other affective disorders. It is, therefore, recommended that involutional patients not be given this diagnosis unless all other affective disorders have been ruled out.
See Major Depression