National Healthcare Quality and Disparities Report
Latest available findings on quality of and access to health care
Data
- Data Infographics
- Data Visualizations
- Data Tools
- Data Innovations
- All-Payer Claims Database
- Healthcare Cost and Utilization Project (HCUP)
- Medical Expenditure Panel Survey (MEPS)
- AHRQ Quality Indicator Tools for Data Analytics
- State Snapshots
- United States Health Information Knowledgebase (USHIK)
- Data Sources Available from AHRQ
Search All Research Studies
Topics
- Cardiovascular Conditions (5)
- Diabetes (1)
- Disparities (1)
- Elderly (2)
- Evidence-Based Practice (1)
- Healthcare Cost and Utilization Project (HCUP) (1)
- Health Information Technology (HIT) (1)
- Health Status (1)
- (-) Heart Disease and Health (10)
- (-) Hospitalization (10)
- Hospital Readmissions (1)
- Hospitals (1)
- Inpatient Care (1)
- Medical Devices (1)
- Medicare (3)
- (-) Mortality (10)
- Obesity (1)
- Outcomes (2)
- Patient-Centered Outcomes Research (1)
- Pneumonia (1)
- Racial and Ethnic Minorities (2)
- Rehabilitation (2)
- Risk (3)
- Social Determinants of Health (1)
- Surgery (2)
AHRQ Research Studies
Sign up: AHRQ Research Studies Email updates
Research Studies is a compilation of published research articles funded by AHRQ or authored by AHRQ researchers.
Results
1 to 10 of 10 Research Studies DisplayedAngraal S, Mortazavi BJ, Gupta A
Machine learning prediction of mortality and hospitalization in heart failure with preserved ejection fraction.
This study developed models to predict the risk of death and hospitalization in patients with heart failure (HF) with preserved ejection fraction (HFpEF). Data was used from the TOPCAT (Treatment of Preserved Cardiac Function Heart Failure with an Aldosterone Antagonist) clinical trial. Five methods: logistic regression with a forward selection of variables; logistic regression with a lasso regularization for variable selection; random forest (RF); gradient descent boosting; and support vector machine, were used to train models for assessing risks of mortality and HF hospitalization through 3 years of follow-up and were validated using 5-fold cross-validation. RF was found to be the best performing model for predicting mortality and HF hospitalization. Blood urea nitrogen levels, body mass index, and Kansas City Cardiomyopathy Questionnaire (KCCQ) subscale scores were strongly associated with mortality, while hemoglobin level, blood urea nitrogen, time since previous HF hospitalization, and KCCQ scores were the most significant predictors of HF hospitalization.
AHRQ-funded; HS023000.
Citation: Angraal S, Mortazavi BJ, Gupta A .
Machine learning prediction of mortality and hospitalization in heart failure with preserved ejection fraction.
JACC Heart Fail 2020 Jan;8(1):12-21. doi: 10.1016/j.jchf.2019.06.013..
Keywords: Heart Disease and Health, Cardiovascular Conditions, Mortality, Hospitalization, Risk, Health Status, Health Information Technology (HIT)
Patel DK, Duncan MS, Shah AS
Association of cardiac rehabilitation with decreased hospitalization and mortality risk after cardiac valve surgery.
Investigators sought to characterize cardiac rehabilitation (CR) enrollment after cardiac valve surgery and its association with outcomes, including hospitalizations and mortality. Subjects were all fee-for-service Medicare beneficiaries undergoing open cardiac valve surgery in 2014, identified by inpatient diagnosis codes for open aortic, mitral, tricuspid, and pulmonary valve surgery. They found that fewer than half of Medicare beneficiaries undergoing cardiac valve surgery enrolled in CR programs, and there were marked racial/ethnic disparities among those who do. They recommend further study on barriers to CR enrollment in this population.
AHRQ-funded; HS022990.
Citation: Patel DK, Duncan MS, Shah AS .
Association of cardiac rehabilitation with decreased hospitalization and mortality risk after cardiac valve surgery.
JAMA Cardiol 2019 Dec;4(12):11887-1301. doi: 10.1001/jamacardio.2019.4032..
Keywords: Cardiovascular Conditions, Heart Disease and Health, Rehabilitation, Hospitalization, Surgery, Mortality, Risk, Elderly
Desai NR, Ott LS, George EJ
Variation in and hospital characteristics associated with the value of care for Medicare beneficiaries with acute myocardial infarction, heart failure, and pneumonia.
The objectives of this study were to investigate the association between hospital-level 30-day risk-standardized mortality rates (RSMRs) and 30-day risk-standardized payments (RSPs) for acute myocardial infarction (AMI), heart failure (HF), and pneumonia (PNA); to characterize patterns of value in care; and to identify hospital characteristics associated with high-value care (defined by having lower than median RSMRs and RSPs).
AHRQ-funded; HS023000.
Citation: Desai NR, Ott LS, George EJ .
Variation in and hospital characteristics associated with the value of care for Medicare beneficiaries with acute myocardial infarction, heart failure, and pneumonia.
JAMA Netw Open 2018 Oct 5;1(6):e183519. doi: 10.1001/jamanetworkopen.2018.3519..
Keywords: Cardiovascular Conditions, Elderly, Hospitalization, Hospitals, Heart Disease and Health, Inpatient Care, Medicare, Mortality, Pneumonia
Hirayama A, Goto T, Shimada YJ
Association of obesity with severity of heart failure exacerbation: a population-based study.
Researchers investigate the associations of obesity with severity of heart failure exacerbation and in-hospital mortality using population-based data from the State Inpatient Databases. Subjects were adults hospitalized for heart failure exacerbation in seven States from 2012 to 2013. The researchers found that, based on large population-based data sets of patients with heart failure exacerbation, obesity was associated with higher acute severity measures but lower in-hospital mortality.
AHRQ-funded; HS023305.
Citation: Hirayama A, Goto T, Shimada YJ .
Association of obesity with severity of heart failure exacerbation: a population-based study.
J Am Heart Assoc 2018 Mar 15;7(6). doi: 10.1161/jaha.117.008243..
Keywords: Healthcare Cost and Utilization Project (HCUP), Obesity, Heart Disease and Health, Cardiovascular Conditions, Hospitalization, Mortality
Bachmann JM, Duncan MS, Shah AS
Association of cardiac rehabilitation with decreased hospitalizations and mortality after ventricular assist device implantation.
This study examined whether outcomes of cardiac patients who had received ventricular assist device (VAD) implementation had decreased hospitalization and mortality with cardiac rehabilitation (CR). Medicare beneficiaries enrolled for disability or aged 65 years and older in 2014 were included. The investigators identified VAD recipients by diagnosis codes. It was found that each 5-year increase in age was associated with attending an additional 1.6 CR sessions and there was a 23% lower 1-year hospitalization risk and a 47% lower 1-year mortality risk.
AHRQ-funded; HS022990.
Citation: Bachmann JM, Duncan MS, Shah AS .
Association of cardiac rehabilitation with decreased hospitalizations and mortality after ventricular assist device implantation.
JACC Heart Fail 2018 Feb;6(2):130-39. doi: 10.1016/j.jchf.2017.11.002..
Keywords: Cardiovascular Conditions, Rehabilitation, Heart Disease and Health, Medical Devices, Surgery, Patient-Centered Outcomes Research, Outcomes, Mortality, Evidence-Based Practice, Hospitalization
Durstenfeld MS, Ogedegbe O, Katz SD
Racial and ethnic differences in heart failure readmissions and mortality in a large municipal healthcare system.
This study sought to determine whether racial and ethnic differences exist among patients with similar access to care. It examined outcomes after heart failure hospitalization within a large municipal health system and determined that racial and ethnic differences in outcomes were present.
AHRQ-funded; HS023683.
Citation: Durstenfeld MS, Ogedegbe O, Katz SD .
Racial and ethnic differences in heart failure readmissions and mortality in a large municipal healthcare system.
JACC Heart Fail 2016 Nov;4(11):885-93. doi: 10.1016/j.jchf.2016.05.008.
.
.
Keywords: Heart Disease and Health, Hospital Readmissions, Hospitalization, Mortality, Outcomes, Racial and Ethnic Minorities
Chen J, Hsieh AF, Dharmarajan K
National trends in heart failure hospitalization after acute myocardial infarction for Medicare beneficiaries: 1998-2010.
This study used a complete national sample of 2 789 943 AMI hospitalizations of Medicare fee-for-service beneficiaries from 1998 through 2010, we evaluated annual changes in the incidence of subsequent heart failure (HF) hospitalization and mortality using Poisson and survival analysis models. It found that HF hospitalization after AMI decreased from 1998 to 2010, which may indicate improvements in the management of AMI.
AHRQ-funded; HS018781.
Citation: Chen J, Hsieh AF, Dharmarajan K .
National trends in heart failure hospitalization after acute myocardial infarction for Medicare beneficiaries: 1998-2010.
Circulation 2013 Dec 17;128(24):2577-84. doi: 10.1161/circulationaha.113.003668..
Keywords: Hospitalization, Medicare, Heart Disease and Health, Mortality
Spatz ES, Beckman AL, Wang Y
Geographic variation in trends and disparities in acute myocardial infarction hospitalization and mortality by income levels, 1999-2013.
The researchers sought to determine whether trends in US county-level, risk-standardized acute myocardial infarction (AMI) hospitalization and mortality rates varied by county-based median income level. They concluded that hospitalization and mortality rates of AMI declined among counties of all income levels, although hospitalization rates among low-income counties lag behind those of the higher income groups.
AHRQ-funded; HS023000.
Citation: Spatz ES, Beckman AL, Wang Y .
Geographic variation in trends and disparities in acute myocardial infarction hospitalization and mortality by income levels, 1999-2013.
JAMA Cardiol 2016 Jun 1;1(3):255-65. doi: 10.1001/jamacardio.2016.0382.
.
.
Keywords: Disparities, Hospitalization, Heart Disease and Health, Mortality, Social Determinants of Health
Blecker S, Park H, Katz SD
Association of HbA1c with hospitalization and mortality among patients with heart failure and diabetes.
Comorbid diabetes is common in heart failure and associated with increased hospitalization and mortality. Nonetheless, the association between glycemic control and outcomes among patients with heart failure and diabetes remains poorly characterized, particularly among low income and minority patients. This study found that among a cohort of primarily minority and low income patients with heart failure and diabetes, an increased risk of hospitalization was observed.
AHRQ-funded; HS023683.
Citation: Blecker S, Park H, Katz SD .
Association of HbA1c with hospitalization and mortality among patients with heart failure and diabetes.
BMC Cardiovasc Disord 2016 May 20;16:99. doi: 10.1186/s12872-016-0275-6.
.
.
Keywords: Diabetes, Heart Disease and Health, Mortality, Hospitalization, Racial and Ethnic Minorities
Chaudhry SI, Khan RF, Chen J
National trends in recurrent AMI hospitalizations 1 year after acute myocardial infarction in Medicare beneficiaries: 1999-2010.
The investigators evaluated changes in the incidence of 1-year recurrent acute myocardial infarction (AMI) hospitalization and mortality. In a national sample of Medicare beneficiaries hospitalized for AMI from 1999 to 2010, they found that hospitalization for recurrent AMI decreased, as did subsequent mortality, albeit to a lesser extent. The risk of recurrent AMI hospitalization declined less in black patients than in whites, increasing observed racial disparities by the end of the study period.
AHRQ-funded; HS018781.
Citation: Chaudhry SI, Khan RF, Chen J .
National trends in recurrent AMI hospitalizations 1 year after acute myocardial infarction in Medicare beneficiaries: 1999-2010.
J Am Heart Assoc 2014 Oct;3(5):e001197. doi: 10.1161/jaha.114.001197.
.
.
Keywords: Hospitalization, Medicare, Mortality, Heart Disease and Health, Risk