ArticleResearch in social & administrative pharmacy : RSAP
Medication oversupply in patients with diabetes.
Article in Research in social & administrative pharmacy : RSAP. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 13 citations in OpenAlex.
- Rural-urban disparities in diabetes quality of care with accountable care organization participation.The Journal of rural health : official journal of the American Rural Health Association and the National Rural Health Care Association · 2026Article
- Costs of Prescription Drugs for Children and Parental Adherence to Long-Term Medications.JAMA network open · 2023Article
- Measuring the multiple domains of medication nonadherence: findings from a Delphi survey of adherence experts.Translational behavioral medicine · 2021Article
- Article
- Effect of Dual Use of Veterans Affairs and Medicare Part D Drug Benefits on Antihypertensive Medication Supply in a National Cohort of Veterans with Dementia.Health services research · 2018Article
- Medication Nonadherence: The Role of Cost, Community, and Individual Factors.Health services research · 2017Article
- Observational
- Approaches to Supporting the Analysis of Historical Medication Datasets with RxNorm.AMIA ... Annual Symposium proceedings. AMIA Symposium · 2015Article
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Authors and funding
11 authors at 5 institutions in 1 country.
Funding
Abstract
backgroundStudies in integrated health systems suggest that patients often accumulate oversupplies of prescribed medications, which is associated with higher costs and hospitalization risk. However, predictors of oversupply are poorly understood, with no studies in Medicare Part D.
objectiveThe aim of this study was to describe prevalence and predictors of oversupply of antidiabetic, antihypertensive, and antihyperlipidemic medications in adults with diabetes managed by a large, multidisciplinary, academic physician group and enrolled in Medicare Part D or a local private health plan.
methodsThis was a retrospective cohort study. Electronic health record data were linked to medical and pharmacy claims and enrollment data from Medicare and a local private payer for 2006-2008 to construct a patient-quarter dataset for patients managed by the physician group. Patients' quarterly refill adherence was calculated using ReComp, a continuous, multiple-interval measure of medication acquisition (CMA), and categorized as <0.80 = Undersupply, 0.80-1.20 = Appropriate Supply, >1.20 = Oversupply. We examined associations of baseline and time-varying predisposing, enabling, and medical need factors to quarterly supply using multinomial logistic regression.
resultsThe sample included 2519 adults with diabetes. Relative to patients with private insurance, higher odds of oversupply were observed in patients aged <65 in Medicare (OR = 3.36, 95% CI = 1.61-6.99), patients 65+ in Medicare (OR = 2.51, 95% CI = 1.37-4.60), patients <65 in Medicare/Medicaid (OR = 4.55, 95% CI = 2.33-8.92), and patients 65+ in Medicare/Medicaid (OR = 5.73, 95% CI = 2.89-11.33). Other factors associated with higher odds of oversupply included any 90-day refills during the quarter, psychotic disorder diagnosis, and moderate versus tight glycemic control.
conclusionsOversupply was less prevalent than in previous studies of integrated systems, but Medicare Part D enrollees had greater odds of oversupply than privately insured individuals. Future research should examine utilization management practices of Part D versus private health plans that may affect oversupply.
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