A retrospective analysis of all the suicides at a New York psychiatric hospital over a 25 year period was carried out. It was found that among the patients who committed suicide, 14 had unipolar endogenous depression and of the 14, ten were delusional or probably delusional. Far fewer delusional patients were found among a control group of depressed patients. Thus, there was a significant association between delusions and suicide. (WAL)