Evaluation of compliance and health care utilization in patients treated with single pill vs. free combination antihypertensives

Current Medical Research and Opinion
Weiyi YangArielle G Bensimon

Abstract

To compare compliance/persistence, health care resource utilization, and costs associated with single-pill combination (SPC) vs. free-combination (FC) therapies among adult hypertension patients at the national and state level. Combination therapies with angiotensin receptor blocker (ARB) + calcium channel blocker, ARB + hydrochlorothiazide, and angiotensin-converting enzyme inhibitor + hydrochlorothiazide were evaluated. Patients initiated on SPC or FC were identified in the MarketScan Database (2006-2008). Multivariate regression models were used to compare the health care outcomes of SPC vs. FC use during the 6-month study period. National- and state-level outcomes were analyzed and reported. Compliance was measured by medication possession ratio (MPR), and persistence was assessed based on treatment discontinuation (i.e., a lapse in therapy exceeding 30 days). Utilization and cost outcomes included frequencies of inpatient and emergency room (ER) visits and changes in health care costs from baseline. Adjusting for baseline characteristics, SPC patients (N = 382,476) demonstrated significantly higher MPR than FC patients (N = 197,375) (difference = 11.6%; 95% confidence interval [CI]: 11.4%, 11.7%). SPC patients had fewer al...Continue Reading

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