• J Gen Intern Med · Oct 2006

    Randomized Controlled Trial Multicenter Study Comparative Study

    Impacts of evidence-based quality improvement on depression in primary care: a randomized experiment.

    • Lisa V Rubenstein, Lisa S Meredith, Louise E Parker, Nancy P Gordon, Scot C Hickey, Carole Oken, and Martin L Lee.
    • VA Greater Los Angeles, Los Angeles, CA, USA. lisa_rubenstein@rand.org
    • J Gen Intern Med. 2006 Oct 1; 21 (10): 102710351027-35.

    ContextPrevious studies testing continuous quality improvement (CQI) for depression showed no effects. Methods for practices to self-improve depression care performance are needed. We assessed the impacts of evidence-based quality improvement (EBQI), a modification of CQI, as carried out by 2 different health care systems, and collected qualitative data on the design and implementation process.ObjectiveEvaluate impacts of EBQI on practice-wide depression care and outcomes.DesignPractice-level randomized experiment comparing EBQI with usual care.SettingSix Kaiser Permanente of Northern California and 3 Veterans Administration primary care practices randomly assigned to EBQI teams (6 practices) or usual care (3 practices). Practices included 245 primary care clinicians and 250,000 patients.InterventionResearchers assisted system senior leaders to identify priorities for EBQI teams; initiated the manual-based EBQI process; and provided references and tools. EVALUATION PARTICIPANTS: Five hundred and sixty-seven representative patients with major depression.Main Outcome MeasuresAppropriate treatment, depression, functional status, and satisfaction.ResultsDepressed patients in EBQI practices showed a trend toward more appropriate treatment compared with those in usual care (46.0% vs 39.9% at 6 months, P = .07), but no significant improvement in 12-month depression symptom outcomes (27.0% vs 36.1% poor depression outcome, P = .18). Social functioning improved significantly (mean score 65.0 vs 56.8 at 12 months, P = .02); physical functioning did not.ConclusionEvidence-based quality improvement had perceptible, but modest, effects on practice performance for patients with depression. The modest improvements, along with qualitative data, identify potential future directions for improving CQI research and practice.

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