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  • Title: The effects of quality improvement for depression in primary care at nine years: results from a randomized, controlled group-level trial.
    Author: Wells KB, Tang L, Miranda J, Benjamin B, Duan N, Sherbourne CD.
    Journal: Health Serv Res; 2008 Dec; 43(6):1952-74. PubMed ID: 18522664.
    Abstract:
    OBJECTIVE: To examine 9-year outcomes of implementation of short-term quality improvement (QI) programs for depression in primary care. DATA SOURCES: Depressed primary care patients from six U.S. health care organizations. STUDY DESIGN: Group-level, randomized controlled trial. DATA COLLECTION: Patients were randomly assigned to short-term QI programs supporting education and resources for medication management (QI-Meds) or access to evidence-based psychotherapy (QI-Therapy); and usual care (UC). Of 1,088 eligible patients, 805 (74 percent) completed 9-year follow-up; results were extrapolated to 1,269 initially enrolled and living. Outcomes were psychological well-being (Mental Health Inventory, five-item version [MHI5]), unmet need, services use, and intermediate outcomes. PRINCIPAL FINDINGS: At 9 years, there were no overall intervention status effects on MHI5 or unmet need (largest F (2,41)=2.34, p=.11), but relative to UC, QI-Meds worsened MHI5, reduced effectiveness of coping and among whites lowered tangible social support (smallest t(42)=2.02, p=.05). The interventions reduced outpatient visits and increased perceived barriers to care among whites, but reduced attitudinal barriers due to racial discrimination and other factors among minorities (smallest F (2,41)=3.89, p=.03). CONCLUSIONS: Main intervention effects were over but the results suggest some unintended negative consequences at 9 years particularly for the medication-resource intervention and shifts to greater perceived barriers among whites yet reduced attitudinal barriers among minorities.
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