Horn, E.K.

patient study depression treatment health intervention disorder depressive disorder depressive cost-effectiveness research service group effect quality psychiatry month disease outpatient questionnaire symptom intervention group illness outcome problem phq -9 diabetes katon care manager hospital netherland page number citation purposes antidepressant trial medication management evaluation follow-up article von korff m department method scale care intervention depressive symptoms comorbid control group manager simon depression-free days number van steenbergen-weijenburg review result psychiatrist nurse depression-free score improvement intervention costs antidepressant medication inclusion healthcare health services costs purpose measure 6 months citation contracting training perspective analysis chec-list severity population care model williams jw jr adherence approach