The cost-effectiveness of pharmacist-physician collaborative care models vs usual care on time in target systolic blood pressure range in patients with hypertension: a payer perspective

BACKGROUND: Hypertension is highly prevalent in the United States, affecting nearly half of all adults (43%). Studies have shown that pharmacist-physician collaborative care models (PPCCMs) for hypertension management significantly improve blood pressure (BP) control rates and provide consistent control of BP. Time in target range (TTR) for systolic BP is a novel measure of BP control consistency that is independently associated with decreased cardiovascular risk. There is no evidence that observed improvement in TTR for systolic BP with a PPCCM is cost-effective. OBJECTIVE: To compare the cost-effectiveness of a PPCCM with usual care for the management of hypertension from the payer perspective. METHODS: We used a decision analytic model with a 3-year time horizon based on published literature and publicly available data. The population consisted of adult patients who had a previous diagnosis of high BP (defined as office-based BP ≥ 140/90 mmHg) or were receiving antihypertensive medications. Effectiveness data were drawn from 2 published studies evaluating the effect of PPCCMs (vs usual care) on TTR for systolic BP and the impact of TTR for systolic BP on 4 cardiovascular outcomes (nonfatal myocardial infarction [MI], stroke, heart failure [HF], and cardiovascular disease [CVD] death). The model incorporated direct medical costs, including both programmatic costs (ie, direct costs for provider time) and downstream health care utilization associated with acute cardiovascular events. One-way sensitivity and threshold analyses examined model robustness. RESULTS: In base-case analyses, PPCCM hypertension management was associated with lower downstream medical expenditures (difference: −$162.86) and lower total program costs (difference: −$108.00) when compared with usual care. PPCCM was associated with lower downstream medical expenditures across all parameter ranges tested in the deterministic sensitivity analysis. For every 10,000 hypertension patients managed with PPCCM vs usual care over a 3-year time horizon, approximately 27 CVD deaths, 29 strokes, 21 nonfatal MIs, and 12 incident HF diagnoses are expected to be averted. CONCLUSIONS: This is the first study to evaluate the cost-effectiveness of PPCCM compared to usual care on TTR for systolic BP in adults with hypertension. PPCCM was less costly to administer and resulted in downstream health care savings and fewer acute cardiovascular events relative to usual care. Although further research is needed to evaluate the long-term costs and outcomes of PPCCM, payer coverage of PPCCM services may prevent future health care costs and improve patient cardiovascular outcomes.