Initial depression and response to imipramine in agoraphobia.

Thirty-seven patients participating in a controlled treatment study with imipramine were classified as high or low depressed simultaneously on two depression measures. Analysis of variance by 2 (high-low depressed) X 2 (high-low imipramine dosage) groupings revealed significant dose but no depression main effects. The greater dose effect observed in the low depressed group and the greater response rates found among high-dose patients with low initial depression strongly suggest that the beneficial effect of imipramine in agoraphobia was not primarily antidepressant in nature.