Of 178 patients with AD, at least one depressive symptom was reported by 63%, 24% were rated as being depressed by a trained observer, and 43% were considered depressed by their relatives. Ten per cent had a previous history of depression. Elevated mood was rare, occurring in only six patients (3.5%). Subjects with depressive symptoms had less cognitive impairment and less ventricular enlargement on CT compared with those without symptoms. Widening of the interhemispheric fissure was associated with symptoms of mania but was inversely related to presence of depressive symptoms.
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