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
AHRQ Research Studies Date
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 6 of 6 Research Studies DisplayedAzimi H, Johnson L, Loudermilk C
Medication regimen complexity (MRC-ICU) for in-hospital mortality prediction in COVID-19 patients.
This study’s purpose was to assess if a patient’s medication regimen complexity-intensive care unit (MRC-ICU) score could predict in-hospital mortality in patients with COVID-19. This single-center, observational study was conducted from August 2020 to January 2021. The primary outcome was the area under the receiver operating characteristic (AUROC) for in-hospital mortality for the 48-hour MRC-ICU. The authors assessed age, sequential organ failure assessment (SOFA), and World Health Organization (WHO) COVID-19 Severity Classification. They included 149 patients who had a median SOFA score of 8 (IQR 5-11), and median MRC-ICU score at 48 hours of 15. The in-hospital mortality rate of 36%. The AUROC for MRC-ICU was 0.71 compared to 0.66 for age, 0.81 SOFA, and 0.72 for the WHO Severity Classification. Univariate analysis was used to compare the 4 characteristics. SOFA, MRC-ICU, and WHO Severity Classification all demonstrated significant association with in-hospital mortality, while SOFA, MRC-ICU, and WHO Severity Classification demonstrated significant association with WHO Severity Classification at 7 days. All 4 characteristics showed significant association with mortality; however, only age and SOFA remained significant following multivariate analysis.
AHRQ-funded; HS028485; HS029009.
Citation: Azimi H, Johnson L, Loudermilk C .
Medication regimen complexity (MRC-ICU) for in-hospital mortality prediction in COVID-19 patients.
Hosp Pharm 2023 Dec; 58(6):564-68. doi: 10.1177/00185787231169460..
Keywords: COVID-19, Medication, Mortality, Intensive Care Unit (ICU)
Chen JT, Mehrizi R, Aasman B
Long short-term memory model identifies ARDS and in-hospital mortality in both non-COVID-19 and COVID-19 cohort.
The objective of this study was to identify risk of acute respiratory distress syndrome (ARDS) and in-hospital mortality using a long short-term memory (LSTM) framework in mechanically ventilated (MV) COVID-19 and non-COVID-19 cohorts. The results indicated that the LSTM algorithm accurately identified the risk of ARDS or death in both non-COVID-19 and COVID MV patients. The researchers concluded that a tool that alerts to the risk of ARDS or death can improve the implementation of evidence-based ARDS management and facilitate goals-of-care discussions involving high-risk patients.
AHRQ-funded; HS026188.
Citation: Chen JT, Mehrizi R, Aasman B .
Long short-term memory model identifies ARDS and in-hospital mortality in both non-COVID-19 and COVID-19 cohort.
BMJ Health Care Inform 2023 Sep; 30(1). doi: 10.1136/bmjhci-2023-100782..
Keywords: COVID-19, Mortality, Hospitals, Inpatient Care
Kim D, Swaminathan S, Lee Y
Racial and ethnic disparities in excess deaths after COVID-19 vaccine deployment among persons with kidney failure.
COVID-19 resulted in clear racial/ethnic disparities in excess deaths among persons with kidney failure. It is not clear whether or how these disparities changed throughout the pandemic, especially after the deployment of COVID-19 vaccines. The purpose of this study was to examine disparities in excess mortality for the Medicare population with kidney failure from March 2020, through December 2021. The study found that there were 686,719 patients with kidney failure in January 2020. Researchers reported an increase in excess deaths beginning March 1, 2020, with a peak in January 2021. From March 1, 2020, through January 30, 2021, and there were substantial disparities in excess deaths across racial/ethnic groups. The number of excess deaths was 5582, 4303, and 2679 for non-Hispanic White, non-Hispanic Black, and Hispanic patients, respectively. The percent excess deaths was 31.9% for Hispanic patients, 27.5% for non-Hispanic Black patients, and 16.4% for non-Hispanic White patients. After the wide distribution of COVID-19 vaccines since the end of January 2021, the lowest percent excess deaths was observed among Hispanic patients, followed by Black patients, and White patients.
AHRQ-funded; HS028285.
Citation: Kim D, Swaminathan S, Lee Y .
Racial and ethnic disparities in excess deaths after COVID-19 vaccine deployment among persons with kidney failure.
Clin J Am Soc Nephrol 2023 Sep; 18(9):1207-09. doi: 10.2215/cjn.0000000000000226..
Keywords: COVID-19, Racial and Ethnic Minorities, Disparities, Vaccination, Kidney Disease and Health, Mortality
Paglino E, Lundberg, DJ, Zhou Z
Monthly excess mortality across counties in the United States during the COVID-19 pandemic, March 2020 to February 2022.
Researchers estimated all-cause excess mortality for the US by county and month by using a Bayesian hierarchical model focused on data from 2015-2019. Overall, excess mortality decreased in large metropolitan counties but increased in nonmetropolitan counties. Nonmetropolitan Southern counties had the highest cumulative relative excess mortality by July 2021. The researchers concluded that their results highlight the need for investments in rural health as the pandemic's rural impact increases.
AHRQ-funded; HS013853.
Citation: Paglino E, Lundberg, DJ, Zhou Z .
Monthly excess mortality across counties in the United States during the COVID-19 pandemic, March 2020 to February 2022.
Sci Adv 2023 Jun 23; 9(25):eadf9742. doi: 10.1126/sciadv.adf9742..
Keywords: COVID-19, Mortality
Feyman Y, Avila CJ, Auty S
Racial and ethnic disparities in excess mortality among U.S. veterans during the COVID-19 pandemic.
This study examined whether minority veterans experienced higher rates of all-cause mortality than White veterans during the COVID-19 pandemic. The authors used administrative data from the Veterans Health Administration’s Corporate Data Warehouse. Veterans were excluded in the analysis if they were missing county of residence or race-ethnicity data. Overall, veteran mortality rates were 16% above normal during March-December 2020 which equates to 42,348 excess deaths. Non-Hispanic White veterans experienced the smallest relative increase in mortality (17%), while Native American veterans had the highest increase (40%). Black Veterans (32%) and Hispanic Veterans (26%) had somewhat lower excess mortality, although these changes were significantly higher compared to White veterans. Disparities were smaller compared to the general population.
AHRQ-funded; HS026395.
Citation: Feyman Y, Avila CJ, Auty S .
Racial and ethnic disparities in excess mortality among U.S. veterans during the COVID-19 pandemic.
Health Serv Res 2023 Jun; 58(3):642-53. doi: 10.1111/1475-6773.14112..
Keywords: COVID-19, Mortality, Racial and Ethnic Minorities, Disparities
Lundberg DJ, Wrigley-Field E, Cho A
COVID-19 mortality by race and ethnicity in US metropolitan and nonmetropolitan areas, March 2020 to February 2022.
Previous research has determined that Hispanic and non-Hispanic Black residents in the United States experienced significantly higher COVID-19 mortality rates in 2020 than non-Hispanic White residents due to structural racism. In 2021, these disparities were observed to decrease. The purpose of this study was to evaluate the extent to which national decreases in racial and ethnic disparities in COVID-19 mortality between the initial pandemic wave and the subsequent Omicron wave reflect decreases in mortality vs other factors, such as the changing geography of the pandemic. The researchers conducted this cross-sectional study using data from the United States Centers for Disease Control and Prevention for COVID-19 deaths from March 1, 2020, through February 28, 2022, in U.S. resident adults aged 25 years and older. Deaths were examined by race and ethnicity across metropolitan and nonmetropolitan areas, and the national decrease in racial and ethnic disparities between the initial wave and Omicron waves was decomposed. The study included death certificates for 977, 018 U.S. that included a mention of COVID-19. The rate of COVID-19 deaths among adults residing in nonmetropolitan areas increased 5.4% during the initial wave to a peak of 23.4% during the Delta wave; the proportion was 21.5% during the Omicron wave. The national disparity in age-standardized COVID-19 death rates per 100,000 person-years for non-Hispanic Black compared with non-Hispanic White adults decreased by 293 deaths. After standardizing for age and racial and ethnic differences by metropolitan vs nonmetropolitan residence, increases in death rates among non-Hispanic White adults explained 40.7% of the decrease (40.7%); 19.6% of the decrease was explained by shifts in mortality to nonmetropolitan areas, where a disproportionate share of non-Hispanic White adults resided. The remaining 39.6% of the decrease was explained by decreases in death rates in non-Hispanic Black adults. The researchers concluded that the majority of the national decrease in racial and ethnic disparities in COVID-19 mortality between the initial wave and Omicron waves was explained by increased mortality among non-Hispanic White adults and changes in the geographic distribution of the pandemic.
AHRQ-funded; HS013853.
Citation: Lundberg DJ, Wrigley-Field E, Cho A .
COVID-19 mortality by race and ethnicity in US metropolitan and nonmetropolitan areas, March 2020 to February 2022.
JAMA Netw Open 2023 May; 6(5):e2311098. doi: 10.1001/jamanetworkopen.2023.11098..
Keywords: COVID-19, Mortality, Racial and Ethnic Minorities