Leveraging Real World Evidence in Disease Management Decision Making with a Total Cost of Care Estimator.
BACKGROUND Health management is becoming increasingly complex, given a range of care options and the need to balance costs and quality. The ability to measure and understand drivers of costs is critical for healthcare organizations to effectively manage their patient populations. Healthcare decision makers can leverage real world evidence to explore the value of disease management interventions in shifting total cost trends. OBJECTIVE To develop a real world, evidence based estimator that examines the impact of disease management interventions on the total cost of care (TCoC) for a patient population with nonvalvular atrial fibrillation (NVAF) METHODS Data were collected from a patient level real world evidence data set that uses the IMS PharMetrics Health Plan Claims Database. Pharmacy and medical claims for patients meeting the inclusion or exclusion criteria were combined in longitudinal cohorts with a 180 day preindex and 360 day follow up period. Descriptive statistics, such as mean and median patient costs and event rates, were derived from a real world evidence analysis and were used to populate the base case estimates within the TCoC estimator, an exploratory economic model that was designed to estimate the potential impact of several disease management activities on the TCoC for a patient population with NVAF. Using Microsoft Excel, the estimator is designed to compare current direct costs of medical care to projected costs by varying assumptions on the impact of disease management activities and applying the associated changes in cost trends to the affected populations. Disease management levers are derived from literature based concepts affecting costs along the NVAF disease continuum. The use of the estimator supports analyses across 4 US geographic regions, age, cost types, and care settings during 1 year. RESULTS All patients included in the study were continuously enrolled in their health plan (within the IMS PharMetrics Health Plan Claims Database) between July 1, 2010, and June 30, 2012. Patients were included in the final analytic file and were indexed based on (1) the service date of the first claim within the selection window (December 28, 2010 July 11, 2011) with a diagnosis of NVAF, or (2) the service date of the second claim for an NVAF medication of interest during the same selection window. The model estimates the current trends in national benchmark data for a hypothetical health plan with 1 million covered lives. The annual total direct healthcare costs (allowable and patient out of pocket costs) of managing patients with NVAF in this hypothetical plan are estimated at $184,981,245 $25,754 per patient, for 7183 patients) A potential 25% improvement from the base case disease burden and disease management could translate into TCoC savings from reducing the excess costs related to hypertension 5.3% and supporting the use of an appropriate antithrombotic treatment that prevents ischemic stroke 0.7% and reduces bleeding events 0.1% CONCLUSIONS The use of the TCoC estimator supports population health management by providing real world evidence benchmark data on NVAF disease burden and by quantifying the potential value of disease management activities in shifting cost trends.
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