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AHRQ Research Studies
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Research Studies is a compilation of published research articles funded by AHRQ or authored by AHRQ researchers.
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1 to 5 of 5 Research Studies DisplayedFlory JH, Mushlin AI
Effect of cost and formulation on persistence and adherence to initial metformin therapy for type 2 diabetes.
This paper studied whether persistence and adherence to initial release (IR) metformin was at the same levels as extended release (ER) metform for adults with type 2 diabetes. A study was conducted using merged de-identified claims data from commercial insurance carriers in the US from 2012 to 2016. The cohort used was identified as patients aged 18 years or older who filled an initial 30-day prescription for metformin monotherapy with a baseline type 2 diabetes diagnosis, at least 1 year of baseline and follow-up data, and no prior antidiabetes drug use. “Persistence” was defined as at least one metformin prescription claim during the 6-12 month window after the initial prescription. “Adherence” was defined as the percentage of days for which the patient had filled sufficient prescriptions to be taking it “as prescribed”. The final study population was 81,406 patients, with 78% having commercial insurance, 19% Medicare Advantage, and 2.5% were dual-eligible for Medicare and Medicare. Persistence was slightly higher for ER metformin than for IR metformin, as was adherence and adequate adherence (80% or more). Despite the slightly higher cost, initial use of ER metformin was associated with better adherence.
AHRQ-funded; HS023898.
Citation: Flory JH, Mushlin AI .
Effect of cost and formulation on persistence and adherence to initial metformin therapy for type 2 diabetes.
Diabetes Care 2020 Jun;43(6):e66-e67. doi: 10.2337/dc19-2426..
Keywords: Diabetes, Chronic Conditions, Healthcare Costs, Medication, Patient Adherence/Compliance
Kang H, Lobo JM, Kim S
Cost-related medication non-adherence among U.S. adults with diabetes.
The purpose of this study is to examine factors that affect cost-related medication non-adherence (CRN), defined as taking medication less than as prescribed because of cost, among adults with diabetes and to determine their relative contribution in explaining CRN. Among other results, the study found that Insulin users had 1.24 times higher risk of CRN compared to those not on insulin.
AHRQ-funded; HS018542.
Citation: Kang H, Lobo JM, Kim S .
Cost-related medication non-adherence among U.S. adults with diabetes.
Diabetes Res Clin Pract 2018 Sep;143:24-33. doi: 10.1016/j.diabres.2018.06.016..
Keywords: Diabetes, Healthcare Costs, Medication, Patient Adherence/Compliance
Karter AJ, Parker MM, Solomon MD
Effect of out-of-pocket cost on medication initiation, adherence, and persistence among patients with type 2 diabetes: the Diabetes Study of Northern California (DISTANCE).
This study estimated the effect of out-of-pocket (OOP) cost on nonadherence to classes of cardiometabolic medications among patients with diabetes. Primary nonadherence (never dispensed) increased monotonically with OOP cost after adjusting for demographics, neighborhood socioeconomic status, Medicare, medical financial assistance, OOP maximum, deductibles, mail order pharmacy incentive and use, drug type, generic or brand, day's supply, and comorbidity index.
AHRQ-funded; HS022408.
Citation: Karter AJ, Parker MM, Solomon MD .
Effect of out-of-pocket cost on medication initiation, adherence, and persistence among patients with type 2 diabetes: the Diabetes Study of Northern California (DISTANCE).
Health Serv Res 2018 Apr;53(2):1227-47. doi: 10.1111/1475-6773.12700.
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Keywords: Diabetes, Healthcare Costs, Health Insurance, Medication, Patient Adherence/Compliance
Lyles CR, Seligman HK, Parker MM
Financial strain and medication adherence among diabetes patients in an integrated health care delivery system: The Diabetes Study of Northern California (DISTANCE).
The researchers examined self-reported financial strain in relation to pharmacy utilization adherence data. Their analysis of survey, administrative, and electronic medical data from Kaiser Permanente Northern California found that 8 percent and 9 percent reported general and medication-specific financial strain. In adjusted models, general strain was significantly associated with primary nonadherence and refilling late and medication-specific strain was ssociated with primary nonadherence.
AHRQ-funded; HS022408.
Citation: Lyles CR, Seligman HK, Parker MM .
Financial strain and medication adherence among diabetes patients in an integrated health care delivery system: The Diabetes Study of Northern California (DISTANCE).
Health Serv Res 2016 Apr;51(2):610-24. doi: 10.1111/1475-6773.12346.
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Keywords: Diabetes, Medication, Patient Adherence/Compliance, Healthcare Costs, Healthcare Delivery
Miller GE, Sarpong EM, Hill SC
AHRQ Author: Miller GE, Sarpong EM, Hill SC
Does increased adherence to medications change health care financial burdens for adults with diabetes?
The aim of the present study was to investigate increased out-of-pocket drug costs and financial burdens of achieving adherence to oral antidiabetic medications and medications for prevalent comorbidities. The researchers found that the mean simulated additional out-of-pocket drug costs of achieving adherence were $310 for uninsured adults treated for diabetes. These additional drug costs would increase the percentage of uninsured adults with financial burden.
AHRQ-authored.
Citation: Miller GE, Sarpong EM, Hill SC .
Does increased adherence to medications change health care financial burdens for adults with diabetes?
J Diabetes 2015 Nov;7(6):872-80. doi: 10.1111/1753-0407.12292..
Keywords: Medical Expenditure Panel Survey (MEPS), Healthcare Costs, Diabetes, Patient Adherence/Compliance, Medication