IMPACT collaborative care improves depression in elderly patients in primary care in the longer term.

Intervention: 12 month collaborative care intervention (Improving Mood Promoting Access to Collaborative Treatment (IMPACT)) or usual care for depression. Collaborative care intervention: care was delivered by a team consisting of a depression care manager, a psychiatrist, and the participant’s primary care doctor. Treatment options included education, behavioural activation, problem solving treatment, antidepressants, and relapse prevention (including coping strategies). Usual care: participants and their primary care doctor received notification that they met the study criteria for depression, and were allowed access to antidepressants, counselling by the doctor, and referral to mental healthcare specialists.