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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.
Results
1 to 25 of 123 Research Studies DisplayedI Auerbach, M Badaki-Makun, O
AHRQ Author: Barata
A research agenda to advance pediatric emergency care through enhanced collaboration across emergency departments.
In 2018, the Society for Academic Emergency Medicine and the journal Academic Emergency Medicine (AEM) convened a consensus conference entitled, "Academic Emergency Medicine Consensus Conference: Aligning the Pediatric Emergency Medicine Research Agenda to Reduce Health Outcome Gaps." This article is the product of the breakout session, "Emergency Department Collaboration-Pediatric Emergency Medicine in Non-Children's Hospital."
AHRQ-funded; HS026101.
Citation: I Auerbach, M Badaki-Makun, O .
A research agenda to advance pediatric emergency care through enhanced collaboration across emergency departments.
Acad Emerg Med 2018 Dec;25(12):1415-26. doi: 10.1111/acem.13642..
Keywords: Care Coordination, Children/Adolescents, Emergency Department, Evidence-Based Practice, Health Services Research (HSR), Outcomes, Quality of Care, Quality Improvement
Wahl TS, Goss LE, Morris MS
Enhanced Recovery After Surgery (ERAS) eliminates racial disparities in postoperative length of stay after colorectal surgery.
The purpose of this study was to investigate the effects of enhanced recovery after surgery (ERAS) on racial disparities in postoperative length of stay (pLOS) after colorectal surgery. The authors hypothesized that ERAS would reduce disparities in pLOS between black and white patients. They concluded that ERAS eliminated racial differences in pLOS between black and white patients undergoing colorectal surgery. Reduced pLOS occurred without increases in mortality, readmissions, and most postoperative complications.
AHRQ-funded; HS013852.
Citation: Wahl TS, Goss LE, Morris MS .
Enhanced Recovery After Surgery (ERAS) eliminates racial disparities in postoperative length of stay after colorectal surgery.
Ann Surg 2018 Dec;268(6):1026-35. doi: 10.1097/sla.0000000000002307..
Keywords: Surgery, Racial and Ethnic Minorities, Disparities, Care Management, Healthcare Delivery, Hospitalization, Patient-Centered Outcomes Research, Outcomes
Adelgais KM, Hansen M, Lerner EB
Establishing the key outcomes for pediatric emergency medical services research.
The evidence supporting best practices when treating children in the prehospital setting or even the effect emergency medical services (EMS) has on patient outcomes is limited. This article describes a consensus process among stakeholders in the pediatric emergency medicine and EMS community that identified the critical outcomes for EMS care in five clinical areas (traumatic brain injury, general injury, respiratory disease/failure, sepsis, and seizures).
AHRQ-funded; HS026101.
Citation: Adelgais KM, Hansen M, Lerner EB .
Establishing the key outcomes for pediatric emergency medical services research.
Acad Emerg Med 2018 Dec;25(12):1345-54. doi: 10.1111/acem.13637..
Keywords: Children/Adolescents, Emergency Medical Services (EMS), Evidence-Based Practice, Health Services Research (HSR), Outcomes, Patient-Centered Outcomes Research
Ishimine P, Adelgais K, Barata I
Executive summary: the 2018 Academic Emergency Medicine Consensus Conference: Aligning the Pediatric Emergency Medicine Research Agenda to Reduce Health Outcome Gaps.
Emergency care providers share a compelling interest in developing an effective patient-centered, outcomes-based research agenda that can decrease variability in pediatric outcomes. The 2018 Academic Emergency Medicine Consensus Conference "Aligning the Pediatric Emergency Medicine Research Agenda to Reduce Health Outcome Gaps (AEMCC)" aimed to fulfill this role. This paper discusses the conference which convened major thought leaders and stakeholders to introduce a research, scholarship, and innovation agenda for pediatric emergency care specifically to reduce health outcome gaps.
AHRQ-funded; HS026101.
Citation: Ishimine P, Adelgais K, Barata I .
Executive summary: the 2018 Academic Emergency Medicine Consensus Conference: Aligning the Pediatric Emergency Medicine Research Agenda to Reduce Health Outcome Gaps.
Acad Emerg Med 2018 Dec;25(12):1317-26. doi: 10.1111/acem.13667..
Keywords: Implementation, Evidence-Based Practice, Patient-Centered Outcomes Research, Children/Adolescents, Emergency Department, Outcomes, Research Methodologies
Anesi JA, Lautenbach E, Nachamkin I
Poor clinical outcomes associated with community-onset urinary tract infections due to extended-spectrum cephalosporin-resistant Enterobacteriaceae.
In this retrospective cohort study, the investigators sought to determine the clinical outcomes associated with community-onset ESC-resistant (ESC-R) EB urinary tract infections (UTIs) in a US health system. The authors found that community-onset UTI due to an ESC-R EB organism was significantly associated with clinical failure, which may be due in part to inappropriate initial antibiotic therapy. They indicate that further studies are needed to determine which patients in the community are at high risk for drug-resistant infection to help inform prompt diagnosis and appropriate antibiotic prescribing for ESC-R EB.
AHRQ-funded; HS020002.
Citation: Anesi JA, Lautenbach E, Nachamkin I .
Poor clinical outcomes associated with community-onset urinary tract infections due to extended-spectrum cephalosporin-resistant Enterobacteriaceae.
Infect Control Hosp Epidemiol 2018 Dec;39(12):1431-35. doi: 10.1017/ice.2018.254..
Keywords: Antibiotics, Community-Acquired Infections, Medication, Outcomes, Patient Safety, Urinary Tract Infection (UTI)
Hornor MA, Liu JY, Hu QL
Surgical technical evidence review for acute appendectomy conducted for the Agency for Healthcare Research and Quality Safety Program for Improving Surgical Care and Recovery.
This evidence review uses enhanced recovery pathways (ERPs) protocols developed for the AHRQ-funded Safety Program for Improving Surgical Care and Recovery (ISCR Program) to develop ERPs for acute appendectomy surgery. The authors classified appendicitis into uncomplicated (nonperforated) and complicated (perforated or gangrenous) to help with risk stratification. They identified 13 components for appendectomy for review. The processes are organized by perioperative phase, and each phase includes the rationale, evidence review, summary of guidelines, and a recommendation summary of the evidence for or against inclusion in the ERP. Preoperative management components included: education and counseling; preoperative antibiotics; initial nonsurgical management for perforated appendicitis with abscess or phlegmon, venous thromboembolism prophylaxis, delay for operation for 12-24 hours for uncomplicated appendicitis. Intraoperative management components include: laparoscopic surgical technique, peritoneal drain placement, urinary catheter placement, and prophylactic nasogastric tube insertion. Postoperative management components include same-day surgery discharge for uncomplicated appendicitis, antibiotics, early oral alimentation, and early mobilization. Of the ERPs reviewed: there was no evidence to support the routine use of abdominal drainage in patients undergoing appendectomies, urinary catheter insertion for laparoscopic surgery, use of prophylactic nasogastric tube placement, postoperative antibiotic use for uncomplicated appendicitis, and early oral alimentation for uncomplicated appendicitis.
AHRQ-funded.
Citation: Hornor MA, Liu JY, Hu QL .
Surgical technical evidence review for acute appendectomy conducted for the Agency for Healthcare Research and Quality Safety Program for Improving Surgical Care and Recovery.
J Am Coll Surg 2018 Dec;227(6):605-17.e2. doi: 10.1016/j.jamcollsurg.2018.09.024..
Keywords: Surgery, Quality Improvement, Quality of Care, Patient Safety, Evidence-Based Practice, Patient-Centered Outcomes Research, Outcomes
Burgermaster M, Murray M, Saiman L
Associations between enteral nutrition and acute respiratory infection among patients in New York metropolitan region pediatric long-term care facilities.
This study investigated the outcomes of children and a subsample of infants in pediatric long-term care facilities are need enteral nutrition (EN). Those patients who need EN had a higher risk of acute pediatric infection (ARI) and a lower odds of discharge than those who did not. Infants had a particular higher risk of comorbidities and infections when they were fed using percutaneous feeding tubes.
AHRQ-funded; HS021470.
Citation: Burgermaster M, Murray M, Saiman L .
Associations between enteral nutrition and acute respiratory infection among patients in New York metropolitan region pediatric long-term care facilities.
Nutr Clin Pract 2018 Dec;33(6):865-71. doi: 10.1002/ncp.10017..
Keywords: Children/Adolescents, Healthcare-Associated Infections (HAIs), Nutrition, Outcomes, Patient-Centered Outcomes Research, Patient Safety, Respiratory Conditions, Long-Term Care
Bateni SB, Olson JL, Hoch JS
Drivers of cost for pancreatic surgery: it's not about hospital volume.
Researchers compared healthcare costs of pancreatic surgery between high- and low-volume centers. They found there was no significant difference in costs, however high-volume centers have better outcomes for morbidity and mortality.
AHRQ-funded; HS022236.
Citation: Bateni SB, Olson JL, Hoch JS .
Drivers of cost for pancreatic surgery: it's not about hospital volume.
Ann Surg Oncol 2018 Dec;25(13):3804-11. doi: 10.1245/s10434-018-6758-1..
Keywords: Healthcare Costs, Hospitals, Outcomes, Patient Safety, Surgery
Agarwal D, Werner RM
Effect of hospital and post-acute care provider participation in accountable care organizations on patient outcomes and Medicare spending.
The purpose of this study was to test for differences in patient outcomes when hospital and post-acute care (PAC) providers participated in accountable care organizations (ACOs). The investigators concluded that hospital and skilled nursing facilities (SNF) participation in an ACO was associated with lower readmission rates, Medicare spending on SNF, and SNF length of stay.
AHRQ-funded; HS024266.
Citation: Agarwal D, Werner RM .
Effect of hospital and post-acute care provider participation in accountable care organizations on patient outcomes and Medicare spending.
Health Serv Res 2018 Dec;53(6):5035-56. doi: 10.1111/1475-6773.13023..
Keywords: Hospital Readmissions, Hospitals, Medicare, Nursing Homes, Outcomes
Zullo AR, Hersey M, Lee Y
Outcomes of "diabetes-friendly" vs "diabetes-unfriendly" beta-blockers in older nursing home residents with diabetes after acute myocardial infarction.
This study analyzed outcomes of using beta-blockers that are considered “diabetes-friendly” vs “diabetes-unfriendly” in older nursing home residents with diabetes after acute myocardial infarction (AMI). Primary outcomes included hospitalizations for hypoglycemia and hyperglycemia in the 90 days after AMI and secondary outcomes functional decline, death, all-cause re-hospitalization and fracture hospitalization. Out of 2855 nursing home residents with type-2 diabetes (T2D), 29% were prescribed a diabetes-friendly beta-blocker vs. 24% without. T2D medicine showed a reduction in hospitalization for hyperglycemia but was unassociated with hypoglycemia. For secondary outcomes T2D-friendly beta-blocks were associated with a greater rate of re-hospitalization but not death, functional decline, or fracture.
AHRQ-funded; HS022998.
Citation: Zullo AR, Hersey M, Lee Y .
Outcomes of "diabetes-friendly" vs "diabetes-unfriendly" beta-blockers in older nursing home residents with diabetes after acute myocardial infarction.
Diabetes Obes Metab 2018 Dec;20(12):2724-32. doi: 10.1111/dom.13451..
Keywords: Cardiovascular Conditions, Diabetes, Elderly, Heart Disease and Health, Hospitalization, Medication, Nursing Homes, Outcomes, Patient-Centered Outcomes Research
Grover S, Desir F, Jing Y
Reduced cancer survival among adults with HIV and AIDS-defining illnesses despite no difference in cancer stage at diagnosis.
A cohort of persons with HIV (PWH) who had AIDS-defining illness (ADI) at the time of cancer diagnosis were compared to those without HIV and ADI with cancer diagnosis at the same stages. Those with ADI had a higher mortality rate (30-70%) with lung cancer statistically significant. This finding is related with HIV-related immune suppression.
AHRQ-funded; 90047713.
Citation: Grover S, Desir F, Jing Y .
Reduced cancer survival among adults with HIV and AIDS-defining illnesses despite no difference in cancer stage at diagnosis.
J Acquir Immune Defic Syndr 2018 Dec 1;79(4):421-29. doi: 10.1097/qai.0000000000001842..
Keywords: Cancer, Diagnostic Safety and Quality, Human Immunodeficiency Virus (HIV), Outcomes
Kempker JA, Martin GS
Severity and timing of onset drive economic costs and clinical outcomes with sepsis.
Sepsis disproportionately affects older adults (mean age, 65 yr); is predominantly community acquired (87%); is expensive (mean hospital costs $21,500); and is associated with high hospital mortality (one in eight patients) and high rates of 30-day readmission for survivors (one in eight patients). In this editorial, the authors discuss an article- by Paoli et al, published in 2018 in Volume 46 of Critical Care Medicine- on sepsis epidemiology.
AHRQ-funded; HS025240.
Citation: Kempker JA, Martin GS .
Severity and timing of onset drive economic costs and clinical outcomes with sepsis.
Crit Care Med 2018 Dec;46(12):2043-44. doi: 10.1097/ccm.0000000000003376..
Keywords: Healthcare Costs, Mortality, Outcomes, Sepsis
Wong J, Horwitz MM, Zhou L
Using machine learning to identify health outcomes from electronic health record data.
In this review, the authors discuss four common scenarios that researchers may find helpful for thinking critically about when and for what tasks machine learning may be used to identify health outcomes from electronic health record (EHR) data. The authors suggest that machine learning has great potential to improve the accuracy and efficiency of health outcome identification from EHR systems, especially under certain conditions.
AHRQ-funded; HS022728; HS024264; HS025375.
Citation: Wong J, Horwitz MM, Zhou L .
Using machine learning to identify health outcomes from electronic health record data.
Curr Epidemiol Rep 2018 Dec;5(4):331-42. doi: 10.1007/s40471-018-0165-9..
Keywords: Electronic Health Records (EHRs), Health Information Technology (HIT), Outcomes
Spatz ES
Fostering a culture to support surgical outcome measures.
This editorial comments on the relationship of surgical skills (referring to the gentleness, tissue exposure, instrument handling, time and motion, and flow of operation) and patient outcomes
AHRQ-funded; HS023000.
Citation: Spatz ES .
Fostering a culture to support surgical outcome measures.
Circ Cardiovasc Qual Outcomes 2016 Jul;9(4):345-7. doi: 10.1161/circoutcomes.116.003038.
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Keywords: Outcomes, Provider Performance, Quality Measures, Surgery
Desai RJ, Wyss R, Jin Y
Extension of disease risk score-based confounding adjustments for multiple outcomes of interest: an empirical evaluation.
Use of disease risk score (DRS)-based confounding adjustment when estimating treatment effects on multiple outcomes is not well studied. In this empirical cohort study, the investigators compared dabigatran initiators and warfarin initiators with respect to risks of ischemic stroke and major bleeding in 12 sequential monitoring periods (90 days each), using data from the Truven Marketscan database (Truven Health Analytics, Ann Arbor, Michigan).
AHRQ-funded; HS022193.
Citation: Desai RJ, Wyss R, Jin Y .
Extension of disease risk score-based confounding adjustments for multiple outcomes of interest: an empirical evaluation.
Am J Epidemiol 2018 Nov;187(11):2439-48. doi: 10.1093/aje/kwy130.
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Keywords: Blood Thinners, Cardiovascular Conditions, Medication, Outcomes, Research Methodologies, Risk, Stroke
Likosky DS, Harrington SD, Cabrera L
Collaborative quality improvement reduces postoperative pneumonia after isolated coronary artery bypass grafting surgery.
This study examined post cardiac surgery pneumonia rates associated with participation in a statewide, quality improvement collaborative relative to a national physician reporting program. The investigators concluded that participation in a physician-led collaborative was associated with significant reductions in pneumonia relative to a national quality reporting program. They suggest that interventions including collaborative learning may yield superior outcomes relative to solely using physician feedback reporting.
AHRQ-funded; HS022535.
Citation: Likosky DS, Harrington SD, Cabrera L .
Collaborative quality improvement reduces postoperative pneumonia after isolated coronary artery bypass grafting surgery.
Circ Cardiovasc Qual Outcomes 2018 Nov;11(11):e004756. doi: 10.1161/circoutcomes.118.004756..
Keywords: Outcomes, Patient Safety, Pneumonia, Quality of Care, Quality Improvement, Surgery
Murray KS, Prunty M, Henderson A
Functional status in patients requiring nursing home stay after radical cystectomy.
The objective of this study was to evaluate the ability to perform activities of daily living (ADLs) in patients who required nursing home (NH) care after radical cystectomy (RC), as this surgery can impair patients' ability to perform ADLs in the post-operative period. The investigators found that ADLs, as measured by the Minimum Data Set (MDS)-ADL Long Form score, worsen after RC. They suggest this should be an important part of the risks and benefits conversation with patients, their families, and caregivers.
AHRQ-funded; HS022140.
Citation: Murray KS, Prunty M, Henderson A .
Functional status in patients requiring nursing home stay after radical cystectomy.
Urology 2018 Nov;121:39-43. doi: 10.1016/j.urology.2018.07.030..
Keywords: Cancer, Nursing Homes, Outcomes, Patient-Centered Outcomes Research
Han RH, McKinnon A, CreveCoeur TS
Predictors of mortality for preterm infants with intraventricular hemorrhage: a population-based study.
This study examined the risk factors for mortality in preterm infants with intraventricular hemorrhage (IVH). An overall inpatient mortality occurred in 10% of the cohort of 7437 preterm infants born between 2005 and 2014. Mortality risk was independently associated with a variety of factors including male sex, Asian race, lower gestational age, higher IVH grade, gastrotomy, tracheostomy, and shunt infection.
AHRQ-funded; HS019455.
Citation: Han RH, McKinnon A, CreveCoeur TS .
Predictors of mortality for preterm infants with intraventricular hemorrhage: a population-based study.
Childs Nerv Syst 2018 Nov;34(11):2203-13. Epub ahead of print. doi: 10.1007/s00381-018-3897-4..
Keywords: Healthcare Cost and Utilization Project (HCUP), Mortality, Newborns/Infants, Outcomes
Lifland B, Wright DR, Mangione-Smith R
The impact of an adolescent depressive disorders clinical pathway on healthcare utilization.
The purpose of this study was to examine the association between level of adherence to an adolescent depressive disorders inpatient clinical pathway with psychiatric patients’ length of stay (LOS), cost, and readmissions. Patients in the high-adherence category were found to have significantly longer LOS and higher costs when compared to those in the low-adherence category. The authors conclude that understanding which of the care processes within the pathway are most cost-effective for improving patient-centered outcomes requires further investigation.
AHRQ-funded; HS024299.
Citation: Lifland B, Wright DR, Mangione-Smith R .
The impact of an adolescent depressive disorders clinical pathway on healthcare utilization.
Adm Policy Ment Health 2018 Nov;45(6):979-87. doi: 10.1007/s10488-018-0878-6..
Keywords: Care Management, Children/Adolescents, Depression, Healthcare Costs, Healthcare Utilization, Hospital Readmissions, Hospitalization, Inpatient Care, Behavioral Health, Outcomes, Patient-Centered Outcomes Research
Chen LM, Nallamothu BK, Spertus JA
Racial differences in long-term outcomes among older survivors of in-hospital cardiac arrest.
Black patients have worse in-hospital survival than white patients after in-hospital cardiac arrest (IHCA), but less is known about longterm outcomes. In this study, the investigators sought to assess among IHCA survivors whether there are additional racial differences in survival after hospital discharge and to explore potential reasons for differences. The investigators determined that black survivors of IHCA have lower long-term survival compared with white patients, and about half of this difference is not explained by patient factors or treatments after IHCA.
AHRQ-funded; HS020671; HS024698.
Citation: Chen LM, Nallamothu BK, Spertus JA .
Racial differences in long-term outcomes among older survivors of in-hospital cardiac arrest.
Circulation 2018 Oct 16;138(16):1643-50. doi: 10.1161/circulationaha.117.033211..
Keywords: Cardiovascular Conditions, Elderly, Racial and Ethnic Minorities, Outcomes
Lee T, Qian J, Thamer M
Tradeoffs in vascular access selection in elderly patients initiating hemodialysis with a catheter.
In this study the investigators evaluated clinically relevant vascular access outcomes in elderly patients receiving an arteriovenous fistulas (AVF) or arteriovenous grafts AVG after hemodialysis therapy initiation. The investigators found that in elderly hemodialysis patients initiating hemodialysis therapy with a catheter, the optimal vascular access selection depended on tradeoffs between shorter catheter dependence and less frequent interventions to make the vascular access (AVG) functional versus longer access patency and fewer interventions after successful use of the vascular access (AVF).
AHRQ-funded; HS022931; HS021229.
Citation: Lee T, Qian J, Thamer M .
Tradeoffs in vascular access selection in elderly patients initiating hemodialysis with a catheter.
Am J Kidney Dis 2018 Oct;72(4):509-18. doi: 10.1053/j.ajkd.2018.03.023..
Keywords: Dialysis, Kidney Disease and Health, Elderly, Evidence-Based Practice, Patient-Centered Outcomes Research, Outcomes
Baldwin LM, Fischer MA, Powell J
Virtual educational outreach intervention in primary care based on the principles of academic detailing.
This paper describes the efforts of the Healthy Hearts Northwest (H2N) EvidenceNOW cooperative in providing virtual outreach intervention in primary care based on the principles of academic detailing (AD). EvidenceNOW is AHRQ’s initiative to fund seven regional cooperatives to identify and implement effective strategies to improve the quality of cardiovascular care in communities across the United States. The H2N network covers three states: Oregon, Washington, and Idaho. For this initiative they recruited 259 primary care practices that had 10 full-time or fewer providers and met stage 1 electronic health record meaningful use criteria. The aim was to increase adoption of the four ABCS of heart disease prevention: Aspirin use by high-risk individuals, Blood pressure control, Cholesterol management, and Smoking cessation. Due to the long distances and staffing limitations H2N decided to develop an educational outreach program using virtual visits instead of the traditional AD program structure. The findings and outcomes of this program is described in detail in this paper.
AHRQ-funded; HS023236; HS023908.
Citation: Baldwin LM, Fischer MA, Powell J .
Virtual educational outreach intervention in primary care based on the principles of academic detailing.
J Contin Educ Health Prof 2018 Fall;38(4):269-75. doi: 10.1097/ceh.0000000000000224..
Keywords: Cardiovascular Conditions, Heart Disease and Health, Evidence-Based Practice, Primary Care, Quality Improvement, Quality of Care, Patient-Centered Outcomes Research, Outcomes, Prevention
Rhee C, Filben MR, Massaro AF
Compliance with the national SEP-1 quality measure and association with sepsis outcomes: a multicenter retrospective cohort study.
Many septic patients receive care that fails the Centers for Medicare and Medicaid Services' SEP-1 measure, but it is unclear whether this reflects meaningful lapses in care, differences in clinical characteristics, or excessive rigidity of the "all-or-nothing" measure. This study’s investigators compared outcomes in cases that passed versus failed SEP-1 during the first 2 years after the measure was implemented.
AHRQ-funded; HS025008.
Citation: Rhee C, Filben MR, Massaro AF .
Compliance with the national SEP-1 quality measure and association with sepsis outcomes: a multicenter retrospective cohort study.
Crit Care Med 2018 Oct;46(10):1585-91. doi: 10.1097/ccm.0000000000003261..
Keywords: Quality Measures, Quality Measures, Outcomes, Sepsis
Dworsky JQ, Childers CP, Maggard-Gibbons M
High-risk colorectal surgery: what are the outcomes for geriatric patients?
This study examines the national burden and age-specific outcomes of previously defined high-risk colorectal procedures (HRCP) in geriatric patients using the 2014 National Inpatient Sample. The authors found that outcomes after HRCP are worse for older patients and for nonelective cases. They suggest that this information can inform preoperative counseling and targeted quality improvement projects.
AHRQ-funded; HS000046.
Citation: Dworsky JQ, Childers CP, Maggard-Gibbons M .
High-risk colorectal surgery: what are the outcomes for geriatric patients?
Am Surg 2018 Oct;84(10):1650-54..
Keywords: Elderly, Healthcare Cost and Utilization Project (HCUP), Outcomes, Risk, Surgery
Kundi H, Valsdottir LR, Popma JJ
Impact of a claims-based frailty indicator on the prediction of long-term mortality after transcatheter aortic valve replacement in Medicare beneficiaries.
In this study, the investigators sought to characterize the prognostic importance of frailty factors as identified in healthcare billing records in comparison to validated measures of frailty for the prediction of long-term mortality after transcatheter aortic valve replacement (TAVR). The authors suggest that risk prediction models that include frailty as identified in claims data can be used to predict long-term mortality risk after TAVR.
AHRQ-funded; HS024520.
Citation: Kundi H, Valsdottir LR, Popma JJ .
Impact of a claims-based frailty indicator on the prediction of long-term mortality after transcatheter aortic valve replacement in Medicare beneficiaries.
Circ Cardiovasc Qual Outcomes 2018 Oct;11(10):e005048. doi: 10.1161/circoutcomes.118.005048..
Keywords: Medicare, Mortality, Surgery, Outcomes