• This study employs a method of classification based on "information measure" taxonomy to investigate an aspect of hostility in nonendogenously depressed, endogenously depressed, and nondepressed patients. Results show that there are no statistically significant differences between the three groups as such, but that a patient's self-rating of anger is substantially related to his position on the endogenous-nonendogenous depression dimension. The greater the anger score, the more likely the patient is to present a depressive syndrome of a nonendogenous type. These observations provide support for previous findings in this area and prompt certain tentative theoretical speculations.
Pilowsky I, Spence ND. Hostility and Depressive Illness. Arch Gen Psychiatry. 1975;32(9):1154–1159. doi:10.1001/archpsyc.1975.01760270086013
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