The effect of concurrent affective and alcohol use disorders on suicidal id
eation and behavior was investigated. The Diagnostic Interview Schedule Ver
sion III-R (DIS) was administered to 307 adult Veteran men ranging in age f
rom 23 to78. Participants were classified into one of four groups based on
their final DIS diagnosis-lifetime unipolar depression and lifetime bipolar
I disorder with or without a lifetime alcohol use disorder. Logistic regre
ssion analyses indicated that veterans with a major affective disorder were
at greater risk for suicidality than veterans without an affective disorde
r. However, veterans with unipolar depression were at no greater risk for s
uicidality than those with bipolar I disorder. Unipolar and bipolar 1 disor
ders with a concurrent alcohol use disorder were always associated with an
increased risk for suicidality. (C) 1999 John Wiley & Sons, Inc.