Literature Collection

OBJECTIVE: To examine the relationship between the penetration (or reach) of a national program aiming to integrate mental health clinicians into all primary care clinics (PC-MHI) and rates of guideline-concordant follow-up and treatment among clinic patients newly identified with depression in the Veterans Health Administration (VA). DATA SOURCES/STUDY SETTING: 15,155 screen-positive patients 607,730 patients with 2-item Patient Health Questionnaire scores in 82 primary care clinics, 2015-2019. STUDY DESIGN: In this retrospective cohort study, we used established depression care quality measures to assess primary care patients who (a) newly screened positive (score ≥3) and (b) were identified with depression by clinicians via diagnosis and/or medication (n = 15,155; 15,650 patient-years). Timely follow-up included ≥3 mental health, ≥3 psychotherapy, or ≥3 primary care visits for depression. Minimally appropriate treatment included ≥4 mental health visits, ≥3 psychotherapy, or ≥60 days of medication. In multivariate regressions, we examined whether higher rates of PC-MHI penetration in clinic (proportion of total primary care patients in a clinic who saw any PC-MHI clinician) were associated with greater depression care quality among cohort patients, adjusting for year, healthcare system, and patient and clinic characteristics. DATA COLLECTION/EXTRACTION METHODS: Electronic health record data from 82 VA clinics across three states. PRINCIPAL FINDINGS: A median of 9% of all primary care patients were seen by any PC-MHI clinician annually. In fully adjusted models, greater PC-MHI penetration was associated with timely depression follow-up within 84 days (∆P = 0.5; SE = 0.1; p < 0.001) and 180 days (∆P = 0.3; SE = 0.1; p = 0.01) of a positive depression screen. Completion of at least minimal treatment within 12 months was high (77%), on average, and not associated with PC-MHI penetration. CONCLUSIONS: Greater PC-MHI program penetration was associated with early depression treatment engagement at 84-/180-days among clinic patients newly identified with depression, with no effect on already high rates of completion of minimally sufficient treatment within the year.

Rural populations rely on primary care services for depression care due to shortages and maldistributions of specialty mental health care favoring urban areas. Yet, it is unknown which primary care models are effective at reducing depressive symptoms and emergency department (ED) use for depression among rural populations. The purpose of this systematic review is to synthesize the effectiveness of primary care models on depressive symptoms and ED utilization for depression in rural populations. PubMed, PsycINFO, CINAHL, and reference lists of included studies were searched. Eligible articles focused on the impact of primary care models on depressive symptoms or ED utilization for depression among rural populations in the United States. Seventeen studies met the inclusion criteria. Three care models were identified in the studies, including collaborative care (i.e., team-based integrated care that tracks patient populations with a registry; n = 7), tele-psychotherapy (i.e., identification of patients in primary care and referral to virtual psychotherapy; n = 6), or self-management support (i.e., identification of patients in primary care and referral to community support for depression self-management; n = 4). These care models were associated with improved patient-reported depressive symptoms such as Patient-Health Questionnaire reported remission of depression (score < 5). No studies assessed depression ED utilization as an outcome. Collaborative care, tele-psychotherapy, and self-management support may be effective at reducing depressive symptoms, specifically in rural populations and should be implemented at the practice level. Research focused on primary care models and ED utilization for depression among rural populations is needed.