Which of the following is NOT a common symptom of depression in the elderly?

Increased social interactions is not a common symptom of depression in the elderly. In fact, depression often leads to social withdrawal, decreased interest in social activities, and isolation. This contrasts sharply with the other symptoms listed, which are commonly associated with depression. Changes in sleep patterns typically include insomnia or extended periods of sleep, inability to concentrate affects cognitive function, and feelings of helplessness or hopelessness are classic indicators of depressive disorders. Thus, the presence of increased social interactions would suggest a level of engagement and activity not typically seen in individuals experiencing depression.