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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.
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1 to 4 of 4 Research Studies DisplayedPeng L, Luo G, Walker A
Evaluation of federated learning variations for COVID-19 diagnosis using chest radiographs from 42 US and European hospitals.
The goals of this study were to compare a single-site, COVID-19 computer diagnosis system that used the Federated Averaging (FedAvg) algorithm with 3-client Federated learning (FL) models, and to evaluate the performance of the four FL variations. Researchers leveraged a FL healthcare collaborative that included data from five US and European healthcare systems encompassing 42 hospitals. They concluded that FedAvg could significantly improve generalization of the model in comparison with other personalization FL algorithms--FedProx, FedBN, and FedAMP--but at the cost of poor internal validity.
AHRQ-funded; HS026379.
Citation: Peng L, Luo G, Walker A .
Evaluation of federated learning variations for COVID-19 diagnosis using chest radiographs from 42 US and European hospitals.
J Am Med Inform Assoc 2022 Dec 13;30(1):54-63. doi: 10.1093/jamia/ocac188..
Keywords: COVID-19, Diagnostic Safety and Quality, Imaging, Hospitals
Williams JP, Nathanson R, LoPresti CM
Current use, training, and barriers in point-of-care ultrasound in hospital medicine: a national survey of VA hospitals.
This study aimed to characterize current point-of-care ultrasound (POCUS) use, training needs, and barriers to use among hospital medicine groups (HMGs). This prospective observation study looked at all Veterans Affairs (VA) medical centers from August 2019 to March 2020 using a web-based survey sent to all chiefs of HMGs. There was a 90% response rate from 117 HMGs. Procedural POCUS use decreased by 19% from 2015 to 2020 but increased for diagnostic use for cardiac (8%), pulmonary (7%), and abdominal (8%) applications. The most common barrier to POCUS use was lack of training (89%), with only 34% of HMGs having access to POCUS training. Access to ultrasound equipment was the least common barrier at 57%, however with the proportion of HMGs with ≥1 ultrasound machine increasing from 29% to 71% from 2015 to 2020. In 2020 an average of 3.6 ultrasound devices per HMG was available, and 45% were handheld devices.
AHRQ-funded; HS025979.
Citation: Williams JP, Nathanson R, LoPresti CM .
Current use, training, and barriers in point-of-care ultrasound in hospital medicine: a national survey of VA hospitals.
J Hosp Med 2022 Aug;17(8):601-08. doi: 10.1002/jhm.12911..
Keywords: Imaging, Training, Hospitals, Diagnostic Safety and Quality, Provider: Clinician
Marin JR, Rodean J, Hall M
Racial and ethnic differences in emergency department diagnostic imaging at US children's hospitals, 2016-2019.
Researchers evaluated racial and ethnic differences in the performance of common ED imaging studies and examined patterns across diagnoses. In this study, which evaluated visits by nonhospitalized patients younger than 18 years in 44 US children's hospital EDs, they found that non-Hispanic Black and Hispanic children were less likely to receive diagnostic imaging during ED visits compared with non-Hispanic White children. They recommended further investigation to understand and mitigate these potential disparities in health care delivery and to evaluate the effect of these differential imaging patterns on patient outcomes.
AHRQ-funded; HS026006.
Citation: Marin JR, Rodean J, Hall M .
Racial and ethnic differences in emergency department diagnostic imaging at US children's hospitals, 2016-2019.
JAMA Netw Open 2021 Jan 4(1):e2033710. doi: 10.1001/jamanetworkopen.2020.33710..
Keywords: Children/Adolescents, Hospitals, Emergency Department, Imaging, Racial and Ethnic Minorities, Disparities, Diagnostic Safety and Quality
Henry MK, Zonfrillo MR, French B
Hospital variation in cervical spine imaging of young children with traumatic brain injury.
The authors sought to identify child-level and hospital-level factors associated with performance of cervical imaging of children with traumatic brain injury from falls and abusive head trauma. They found no association between annual hospital volume of injured children and cervical imaging performance.
AHRQ-funded; HS024194.
Citation: Henry MK, Zonfrillo MR, French B .
Hospital variation in cervical spine imaging of young children with traumatic brain injury.
Acad Pediatr 2016 Sep-Oct;16(7):684-91. doi: 10.1016/j.acap.2016.01.017.
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Keywords: Brain Injury, Children/Adolescents, Imaging, Hospitals, Practice Patterns