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Randomised controlled trial.
Single blind (assessors blind to study assignment).
Follow up period:
Eighteen primary care clinics in the United States; time period not stated.
1801 people aged over 60 years old, with current major depression or dysthymia (DSM-IV). Each participant’s number of chronic medical comorbidities diagnosed or treated over the previous three years was ascertained. Exclusion criteria included: history of bipolar disorder or psychosis, current treatment by a psychiatrist, current drinking problems or severe cognitive impairment, or acute risk of suicide.
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