Cyrus Kosar

About

Cyrus M Kosar is an Assistant Professor of Health Services, Policy and Practice at Brown University. He is a health services researcher and health economist whose research broadly pertains to the delivery of care in the Medicare Program. His specific areas of focus include post-acute care, long-term care, end-of-life care, rural health care, risk-adjustment, Medicare Advantage, extreme weather events and Medicare spending, and scope of practice reform. He is currently the principal investigator of a National Institute on Aging-funded R01 that aims to provide evidence on the impact of various post-acute and long-term care policies. His background includes a PhD from Brown University obtained in 2021, a Master's degree from Boston University in 2010, and a Bachelor's degree from Boston University in 2009.

Research topics

• Medicine
• Internal medicine
• Gerontology
• Nursing
• Emergency medicine
• Immunology
• Demography
• Virology
• Environmental health
• Pediatrics

Selected publications

• Risk Factors Associated With All-Cause 30-Day Mortality in Nursing Home Residents With COVID-19

  JAMA Internal Medicine · 2021 · 223 citations

  Importance: The coronavirus disease 2019 (COVID-19) pandemic has severely affected nursing homes. Vulnerable nursing home residents are at high risk for adverse outcomes, but improved understanding is needed to identify risk factors for mortality among nursing home residents. Objective: To identify risk factors for 30-day all-cause mortality among US nursing home residents with COVID-19. Design, Setting, and Participants: This cohort study was conducted at 351 US nursing homes among 5256 nursing…

  DOI

• Variation in <scp>SARS‐CoV</scp> ‐2 Prevalence in <scp>U.S.</scp> Skilled Nursing Facilities

  Journal of the American Geriatrics Society · 2020 · 106 citations

  OBJECTIVE: To identify county and facility factors associated with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) outbreaks in skilled nursing facilities (SNFs). DESIGN: Cross-sectional study linking county SARS-CoV-2 prevalence data, administrative data, state reports of SNF outbreaks, and data from Genesis HealthCare, a large multistate provider of post-acute and long-term care. State data are reported as of April 21, 2020; Genesis data are reported as of May 4, 2020. SETTING AND…

  DOI

• Assessment of Rural-Urban Differences in Postacute Care Utilization and Outcomes Among Older US Adults

  JAMA Network Open · 2020 · 89 citations

  1st authorCorresponding

  Importance: Although people living in rural areas of the United States are disproportionately older and more likely to die of conditions that require postacute care than those living in urban areas, rural-urban differences in postacute care utilization and outcomes have been understudied. Objective: To describe rural-urban differences in postacute care utilization and postdischarge outcomes. Design, Setting, and Participants: This retrospective cohort study used data from Medicare beneficiaries…

  PublisherOA PDFDOI

• Short‐term impact of nursing home <scp>SARS‐CoV</scp> ‐2 vaccinations on new infections, hospitalizations, and deaths

  Journal of the American Geriatrics Society · 2021 · 64 citations

  OBJECTIVE: To compare rates of incident SARS-CoV-2 infection and 30-day hospitalization or death among residents with confirmed infection in nursing homes with earlier versus later SARS-CoV-2 vaccine clinics. DESIGN: Matched pairs analysis of nursing homes that had their initial vaccine clinics between December 18, 2020, and January 2, 2021, versus between January 3, 2021, and January 18, 2021. Matched facilities had their initial vaccine clinics between 12 and 16 days apart. SETTING AND PARTICI…

  DOI

• Differences in setting of initial dementia diagnosis among fee‐for‐service Medicare beneficiaries

  Journal of the American Geriatrics Society · 2024-10-22 · 9 citations

  articleOpen access

  BACKGROUND: Accurate and timely diagnosis of dementia is necessary to allow affected individuals to make informed decisions and access appropriate resources. When dementia goes undetected until a hospitalization or nursing home stay, this could reflect delayed diagnosis or misdiagnosis, and may reflect underlying disparities in healthcare access. METHODS: In this retrospective cohort study, we used 2012-2020 Medicare claims and other administrative data to examine variation in setting of dementi…

  PublisherOA PDFDOI

Frequent coauthors

• Vincent Mor

  Providence College

  89 shared

• Momotazur Rahman

  Brown University

  64 shared

• Sharon K. Inouye

  Beth Israel Deaconess Medical Center

  55 shared

• Richard N. Jones

  Butler Hospital

  53 shared

• Edward R. Marcantonio

  Harvard University

  48 shared

• Kali S. Thomas

  Johns Hopkins University

  48 shared

• Elizabeth M. White

  47 shared

• Thomas G. Travison

  Hebrew SeniorLife

  32 shared

Labs

• Kosar, CyrusPI

Education

• Ph.D.

  Brown University

  2021

• M.A.

  Boston University

  2010

• B.A.

  Boston University

  2009

Similar researchers at Brown University

• James Rudolphh-96
• Ethan Balkh-92