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Research Studies is a compilation of published research articles funded by ´óÏóAPPor authored by ´óÏóAPPresearchers.

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51 to 66 of 66 Research Studies Displayed
Wang Y, Eldridge N, Metersky ML
´óÏóAPPAuthor: Eldridge N, Rodrick D
Association between Medicare expenditures and adverse events for patients with acute myocardial infarction, heart failure, or pneumonia in the United States.
The purpose of this study was to evaluate whether hospital-specific adverse event rates were associated with hospital-specific risk-standardized 30-day episode-of-care Medicare expenditures for fee-for-service patients discharged with acute myocardial infarction (AMI), heart failure (HF), or pneumonia. Investigators concluded that hospitals with high adverse event rates were more likely to have high 30-day episode-of-care Medicare expenditures for patients discharged with AMI, HF, or pneumonia.
AHRQ-authored; AHRQ-funded; 290201200003C.
Citation: Wang Y, Eldridge N, Metersky ML . Association between Medicare expenditures and adverse events for patients with acute myocardial infarction, heart failure, or pneumonia in the United States. JAMA Netw Open 2020 Apr;3(4):e202142. doi: 10.1001/jamanetworkopen.2020.2142..
Keywords: Adverse Events, Patient Safety, Heart Disease and Health, Cardiovascular Conditions, Pneumonia, Medicare, Healthcare Costs
Socal MP, Anderson KE, Sen A
Biosimilar uptake in Medicare Part B varied across hospital outpatient departments and physician practices: the case of filgrastim.
The purpose of this study was to examine the uptake of filgrastim-sndz (Zarxio), the first biosimilar to launch in the United States, in the Medicare Part B fee-for-service program from its launch in September 2015 to December 2017 and compare characteristics of patients and facilities that used filgrastim-sndz or originator filgrastim (Neupogen). The investigators concluded that uptake of biosimilar filgrastim in the Medicare Part B program occurred despite multiple challenges to the adoption of biosimilars in the US market, suggesting that substantial potential savings could be generated by improving biosimilar uptake.
AHRQ-funded; HS000029.
Citation: Socal MP, Anderson KE, Sen A . Biosimilar uptake in Medicare Part B varied across hospital outpatient departments and physician practices: the case of filgrastim. Value Health 2020 Apr;23(4):481-86. doi: 10.1016/j.jval.2019.12.007..
Keywords: Medicare, Practice Patterns, Medication, Healthcare Costs
Tseng CW, Masuda C, Chen R
Impact of higher insulin prices on out-of-pocket costs in Medicare Part D.
In this study, the investigators examined how patients’ out-of-pocket costs for insulin would have dropped from 2014 to 2019 due to Part D policy changes and whether higher insulin prices offset these potential savings. The authors concluded that efforts to reduce patients’
out-of-pocket cost by closing the Medicare Part D coverage gap were largely negated by higher insulin prices.
AHRQ-funded; HS024227.
Citation: Tseng CW, Masuda C, Chen R . Impact of higher insulin prices on out-of-pocket costs in Medicare Part D. Diabetes Care 2020 Apr;43(4):e50-e51. doi: 10.2337/dc19-1294..
Keywords: Medication, Healthcare Costs, Medicare, Health Insurance, Policy
Fahrenbach J, Chin MH, Huang ES
Neighborhood disadvantage and hospital quality ratings in the Medicare Hospital Compare Program.
This study examined the relationship between neighborhood social risk factors (SRFs) and hospital ratings in Medicare's Hospital Compare Program. Results showed that lower hospital summary scores were associated with caring for neighborhoods with higher social risk. Associations between neighborhood SRFs and hospital ratings were largest in the timeliness of care, patient experience, and hospital readmission groups and smallest in the safety, efficiency, and effectiveness of care groups. Failing to account for neighborhood social risk in hospital rating systems may reinforce hidden disincentives to care for medically underserved areas in the United States.
AHRQ-funded; HS023007.
Citation: Fahrenbach J, Chin MH, Huang ES . Neighborhood disadvantage and hospital quality ratings in the Medicare Hospital Compare Program. Med Care 2020 Apr;58(4):376-83. doi: 10.1097/mlr.0000000000001283..
Keywords: Quality of Care, Hospitals, Medicare, Quality Indicators (QIs), Patient Experience, Social Determinants of Health
Myers LC, Faridi MK, Hasegawa K
The hospital readmissions reduction program and readmissions for chronic obstructive pulmonary disease, 2006-2015.
In October 2012, the initial phase of the Hospital Readmission Reduction Program imposed financial penalties on hospitals with higher-than-expected risk-adjusted 30-day readmission rates for Medicare beneficiaries with congestive heart failure, myocardial infarction, and pneumonia. In this study, the investigators hypothesized that these penalties may also be associated with decreased readmissions for chronic obstructive pulmonary disease (COPD) in the general population before COPD became a target condition (October 2014).
AHRQ-funded; HS023305.
Citation: Myers LC, Faridi MK, Hasegawa K . The hospital readmissions reduction program and readmissions for chronic obstructive pulmonary disease, 2006-2015. Ann Am Thorac Soc 2020 Apr;17(4):450-56. doi: 10.1513/AnnalsATS.201909-672OC..
Keywords: Respiratory Conditions, Hospital Readmissions, Hospitals, Chronic Conditions, Medicare
Tang AB, Childers CP, Dworsky JQ
Surgeon work captured by the National Surgical Quality Improvement Program across specialties.
The National Surgical Quality Improvement Program (NSQIP) database is increasingly used for surgical research. However, it is unclear how well this database represents the breadth of work performed by different specialties. Using the 2017 NSQIP participant use file and the 2017 Medicare Physician/Supplier Procedure Summary file, the investigators evaluated (1) what proportion of surgical work was captured by NSQIP, (2) what procedures and disciplines were undersampled, and (3) the overall concordance between the NSQIP sample and a national sample.
AHRQ-funded; HS000046.
Citation: Tang AB, Childers CP, Dworsky JQ . Surgeon work captured by the National Surgical Quality Improvement Program across specialties. Surgery 2020 Mar;167(3):550-55. doi: 10.1016/j.surg.2019.11.013..
Keywords: Surgery, Quality Improvement, Quality of Care, Provider: Physician, Provider, Medicare, Patient-Centered Outcomes Research
Lin SC, Yan PL, Moloci NM
Out-of-network primary care is associated with higher per beneficiary spending in Medicare ACOs.
Despite expectations that Medicare accountable care organizations (ACOs) would curb health care spending, their effect has been modest. One possible explanation is that ACOs' inability to prohibit out-of-network care limits their control over spending. To examine this possibility, the investigators evaluated the association between out-of-network care and per beneficiary spending using national Medicare data for 2012-15.
AHRQ-funded; HS024728; HS024525; HS025165; HS025875.
Citation: Lin SC, Yan PL, Moloci NM . Out-of-network primary care is associated with higher per beneficiary spending in Medicare ACOs. Health Aff 2020 Feb;39(2):310-18. doi: 10.1377/hlthaff.2019.00181..
Keywords: Healthcare Costs, Primary Care, Medicare, Health Insurance
Jalali A, Martin C, Nelson RE
Provider practice competition and adoption of Medicare's Oncology Care Model.
The purpose of this study was to measure the association between regional market competition among medical oncologists with the initial adoption of the Oncology Care Model (OCM). Findings showed that practices in competitive health care markets were more likely to adopt OCM than in noncompetitive markets. Average practice size, number of practices in a hospital referral region, and the hospital bed rate were positively associated with adoption, whereas the rate of full-time equivalent hospital employees to 1000 residents was negatively associated with adoption. Recommendations included careful monitoring of market-level changes among OCM adopters to ensure that the benefits of the OCM outweigh the negative consequences of possible changes in competition.
AHRQ-funded; HS024714.
Citation: Jalali A, Martin C, Nelson RE . Provider practice competition and adoption of Medicare's Oncology Care Model. Med Care 2020 Feb;58(2):154-60. doi: 10.1097/mlr.0000000000001243..
Keywords: Medicare, Workforce, Provider: Physician, Provider
Hong AS, Levin D, Parker L
Trends in diagnostic imaging utilization among Medicare and commercially insured adults from 2003 through 2016.
This study examined trends in use of noninvasive diagnostic imaging (NDI) among commercially insured individuals compared to Medicare enrollees from 2003 through 2016. There was more of an increase among Medicare enrollees than commercially insured patients, but both showed upward trends until the early 2010’s where trends began to be flat or decline. The notable exception was for CT imaging among commercially insured patients aged 45-64 years and Medicare enrollees after 2012.
AHRQ-funded; HS022418.
Citation: Hong AS, Levin D, Parker L . Trends in diagnostic imaging utilization among Medicare and commercially insured adults from 2003 through 2016. Radiology 2020 Feb;294(2):342-50. doi: 10.1148/radiol.2019191116..
Keywords: Diagnostic Safety and Quality, Medicare, Imaging, Healthcare Utilization, Health Insurance
Selden TM
´óÏóAPPAuthor: Selden TM
Differences between public and private hospital payment rates narrowed, 2012-16.
In 2000-12 payments for inpatient hospital stays, emergency department visits, and outpatient hospital care for privately insured patients grew much faster than payments for Medicare and Medicaid patients. This widening of private-public payment gaps slowed or even reversed itself in 2012-16. In this paper, the author discusses the differences between public and private hospital payment rates, 2012-2016.
AHRQ-authored.
Citation: Selden TM . Differences between public and private hospital payment rates narrowed, 2012-16. Health Aff 2020 Jan;39(1):94-99. doi: 10.1377/hlthaff.2019.00415..
Keywords: Medical Expenditure Panel Survey (MEPS), Hospitals, Payment, Healthcare Costs, Medicaid, Medicare
Wickwire EM, Vadlamani A, Tom SE
Economic aspects of insomnia medication treatment among Medicare beneficiaries.
The purpose of this study was to examine economic aspects of insomnia and insomnia medication treatment among a nationally representative sample of older adult Medicare beneficiaries. A total of 23,079 beneficiaries with insomnia were included. Of these, 5,154 (22%) received >1 fills for an FDA-approved insomnia medication following insomnia diagnosis. For both treated and untreated individuals, healthcare utilization and costs increased during the 12 months prior to diagnosis. Insomnia treatment was associated with significantly increased ED visits and prescription fills in the year following insomnia diagnosis.
AHRQ-funded; HS024560.
Citation: Wickwire EM, Vadlamani A, Tom SE . Economic aspects of insomnia medication treatment among Medicare beneficiaries. Sleep 2020 Jan;43(1):pii: zsz192. doi: 10.1093/sleep/zsz192..
Keywords: Medication, Sleep Problems, Medicare, Healthcare Costs
Keeney T, Belanger E, Jones RN
High-need phenotypes in Medicare beneficiaries: drivers of variation in utilization and outcomes.
The goal of this study was to identify distinct clinical phenotypes present within high-need Medicare beneficiaries and to examine differences in outcomes between phenotypes. Researchers identified five phenotypes and concluded that their findings represented a first step toward classifying the heterogeneity among high-need Medicare beneficiaries. They recommend further work to identify modifiable utilization patterns between phenotypes to improve the value of healthcare provided to these subpopulations.
AHRQ-funded; HS000011.
Citation: Keeney T, Belanger E, Jones RN . High-need phenotypes in Medicare beneficiaries: drivers of variation in utilization and outcomes. J Am Geriatr Soc 2020 Jan;68(1):70-77. doi: 10.1111/jgs.16146..
Keywords: Medicare, Research Methodologies, Outcomes, Health Services Research (HSR)
Carey K, Dor A
Hospital response to CMS public reports of hospital charge information.
This study examined trends in charge increases for Medicare inpatients treated in approximately 3400 hospitals after the Centers for Medicare and Medicaid Services (CMS) began reporting charges online in 2013 for Medicare inpatients. The investigators applied difference-in-differences analysis to comprehensive inpatient charge data from New York and Florida for the years 2011-2016. After public reporting was implemented the growth in reported charges in New York hospitals was 4-9% lower than unreported diagnosis-related groups and in Florida it was 2-8% lower.
AHRQ-funded; HS025074.
Citation: Carey K, Dor A . Hospital response to CMS public reports of hospital charge information. Med Care 2020 Jan;58(1):70-73. doi: 10.1097/mlr.0000000000001232..
Keywords: Hospitals, Healthcare Costs, Public Reporting, Medicare, Hospitalization
Markovitz AA, Rozier MD, Ryan AM
Low-value care and clinician engagement in a large Medicare shared savings program ACO: a survey of frontline clinicians.
The purpose of this study was to assess Accountable Care Organization (ACO) engagement of clinicians and whether engagement was associated with clinicians' reported difficulty implementing recommendations against low-value care. Participants included 1289 clinicians in the Physician Organization of Michigan ACO. Results showed that clinicians participating in a large Medicare ACO were broadly unaware of and unengaged with ACO objectives and activities. Whether low clinician engagement limits ACO efforts to reduce low-value care warrants further longitudinal study.
AHRQ-funded; HS024525; HS024728; HS025615.
Citation: Markovitz AA, Rozier MD, Ryan AM . Low-value care and clinician engagement in a large Medicare shared savings program ACO: a survey of frontline clinicians. J Gen Intern Med 2020 Jan;35(1):133-41. doi: 10.1007/s11606-019-05511-8..
Keywords: Medicare, Policy, Provider
Kaye DR, Luckenbaugh AN, Oerline M
Understanding the costs associated with surgical care delivery in the Medicare population.
This study’s objective was to quantify the costs of inpatient and outpatient surgery in the Medicare population. Claims data from a 20% national sample of Medicare beneficiaries was used. Results showed that, while spending on inpatient surgery contributed the most to total surgical payments, it declined over the study period, driven by decreases in index hospitalization and readmissions payments. In contrast, spending on outpatient surgery increased across all sites of care (hospital outpatient department, physician office, and ambulatory surgery center). Ophthalmology and hand surgery witnessed the greatest growth in surgical spending over the study period. Surgical care accounts for half of all Medicare spending.
AHRQ-funded; HS024525; HS024728.
Citation: Kaye DR, Luckenbaugh AN, Oerline M . Understanding the costs associated with surgical care delivery in the Medicare population. Ann Surg 2020 Jan;271(1):23-28. doi: 10.1097/sla.0000000000003165..
Keywords: Surgery, Healthcare Delivery, Healthcare Costs, Medicare, Elderly, Hospitalization
Jarrin OF, Nyandege AN, Grafova IB
Validity of race and ethnicity codes in Medicare administrative data compared with gold-standard self-reported race collected during routine home health care visits.
The authors compared the validity of two race/ethnicity variables found in Medicare administrative data against a gold-standard source also available in the Medicare data warehouse. They found that the race/ethnicity variables contained in Medicare administrative data for minority health disparities research can be improved through the use of self-reported race/ethnicity data. They conclude that future work to improve the accuracy of Medicare beneficiaries' race/ethnicity data should incorporate and augment the self-reported race/ethnicity data contained in assessment and survey data, available within the Medicare data warehouse.
AHRQ-funded; HS022406.
Citation: Jarrin OF, Nyandege AN, Grafova IB . Validity of race and ethnicity codes in Medicare administrative data compared with gold-standard self-reported race collected during routine home health care visits. Med Care 2020 Jan;58(1):e1-e8. doi: 10.1097/mlr.0000000000001216..
Keywords: Racial and Ethnic Minorities, Home Healthcare, Medicare, Data, Disparities, Research Methodologies

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