Depression Decision Support in Primary Care: A Cluster Randomized Trial

Established in 1927 by the American College of Physicians

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Depression Decision Support in Primary Care: A Cluster Randomized Trial

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Figure 1. Study flow chart.

PHQ-9 = Patient Health Questionnaire.

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Table 1. Summary of Depression Decision Support Intervention and Usual Care Components

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Table 2. Baseline Characteristics of Participating Clinicians

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Table 3. Baseline Characteristics of Patients*

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Figure 2. Unadjusted mean Hopkins Symptom Checklist-20 (SCL-20) depression severity scores over time.

Mean ± SE scores for the intervention group were 1.89 ± 0.05 at baseline, 1.54 ± 0.05 at 6 months, and 1.63 ± 0.06 at 12 months. Mean ± SE scores for the usual care group were 1.92 ± 0.05 at baseline, 1.58 ± 0.06 at 6 months, and 1.62 ± 0.06 at 12 months.

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Figure 3. Unadjusted mean Patient Health Questionnaire-9 (PHQ-9) depression scores over time.

P = 0.019 for initial improvement from baseline (quadratic model), comparing intervention and usual care groups.

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Table 4. Adjusted Proportions for Process-of-Care Variables