Some patients come into treatment with clear cases of both major depre
ssion (MDD) and alcoholism. Although assumptions are often made about
the relationships of these two conditions, little empirical informatio
n exists on the effects of changes in MDD on the course of alcoholism
in patients presenting at psychiatric facilities. The authors used sur
vival analysis with time-dependent covariates to investigate the effec
ts of remissions and relapses of MDD on the 5-year course of alcoholis
m in 127 dual diagnosis patients. Changes in the status of MDD had str
ong, significant effects on the course of alcoholism. Improvement in M
DD status increased the chances of remission in alcoholism and reduced
the chances of alcoholism relapse. The status of MDD appears to have
an effect on the course of alcoholism in patients with severe affectiv
e disorders.