In spite of hundreds of thousands of dollars in federal support, American suicide prevention centers have not succeeded in lowering the suicide rate. It is hypothesized that this failure to prevent suicide stems in large measure from the statistically sig-nificant differences between completed suicides and suicidal patients. American sui-cide prevention centers are simply not contacting those persons with high suicide potential. As a result of the present investigation it is concluded specifically that completed suicides are more likely to be male, old, married, to have come from fewer broken homes, to be more independent, less active socially, in poorer physical health, more successful vocationally,'and to have made fewer, more lethal...