Using data from a larger 12-week clinical trial, the authors evaluated the comparative efficacy and safety, of sertraline (n = 42) and fluoxetine (n = 33) in patients otter age 70 with a diagnosis of major depressive disorder. Similar improvement on measures of depression, including remission of depressive symptoms, was evident, although significantly more sertraline-treated patients achieved a criterion clinical response. Significantly, greater improvement for the sertraline group was apparent on the Digit Symbol Substitution Test, but not on two other measures of cognitive functioning. Although there was no difference in the rate of adverse events experienced,fluoxetine-treated patients lost significantly more body weight over the 12-week trial than did sertraline-treated patients, whereas the latter group exhibited significantly more "shaking."