Evidence map›Paper›PMID 28069138›Full record

ArticleInjury2017

Disparities in access to trauma care in the United States: A population-based analysis.

Brendan G Carr, Ariel J Bowman, Catherine S Wolff, Michael T Mullen, Daniel N Holena, Charles C Branas, Douglas J Wiebe

Registry-linked trialAbstract read
In one paragraph

Article in Injury, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04487496 (Determinants of Access to Emergency Surgery at the University College Hospital, Ibadan), which is not on this map. Cited by 73 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed, 4 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT04487496 completednot on this mapstarted 2020, after this paper: background citation

Determinants of Access to Emergency Surgery at the University College Hospital, Ibadan

TypeobservationalSponsorUniversity College Hospital, IbadanRan2020 to 2022Enrolled87ConditionsAccess to Emergency Surgery
3 · Its place in the literature

Who cites it

73 citing papers in PubMed, 4 syntheses or guidelines pooled it.

  1. Guideline
  2. Guideline
  3. Guideline
  4. Pooled it
  5. Article
  6. Article
  7. Article
  8. Agricultural Injuries With Dementia: Double Whammy?American journal of industrial medicine · 2026
    Article
  9. Article
  10. Strategies for improving rural trauma health systems.Trauma surgery & acute care open · 2026
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Disparities in Access to Trauma Care in Canada: A Geospatial Analysis of Census Data.Annals of surgery open : perspectives of surgical history, education, and clinical approaches · 2025
    Article
  16. Article
  17. Racial and Socioeconomic Disparities in Autism Providers' ACEs Inquiries.Journal of autism and developmental disorders · 2025
    Article
  18. Article
  19. Article
  20. Article

13 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors.

Brendan G CarrDepartment of Emergency Medicine, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, United States. Electronic address: brendan.carr@jefferson.edu.
Ariel J BowmanDepartment of Emergency Medicine, LAC + USC Medical Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States. Electronic address: arieljbowman@gmail.com.
Catherine S WolffSchool of Medicine, Duke University, Durham, NC, United States. Electronic address: wolff3@email.unc.edu.
Michael T MullenLeonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, PA, United States; Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA,United States. Electronic address: michael.mullen@uphs.upenn.edu.
Daniel N HolenaDepartment of Surgery; Division of Traumatology, Surgical Critical Care, and Emergency Surgery; Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States. Electronic address: holenad@upenn.edu.
Charles C BranasLeonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, PA, United States; Department of Surgery; Division of Traumatology, Surgical Critical Care, and Emergency Surgery; Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States; Center for Emergency Care Policy & Research, Department of Emergency Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States; Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States. Electronic address: cbranas@upenn.edu.
Douglas J WiebeLeonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, PA, United States; Department of Surgery; Division of Traumatology, Surgical Critical Care, and Emergency Surgery; Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States; Center for Emergency Care Policy & Research, Department of Emergency Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States; Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States; Department of Emergency Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States. Electronic address: dwiebe@upenn.edu.

Funding

The comparative effectiveness of time-adjusted trauma center care on mortalityK08HS017960 · AHRQ · UNIVERSITY OF PENNSYLVANIA · PI CARR, BRENDAN G · 2009 to 2013
$760k
OPTIMIZING TRAUMA SYSTEMS PLANNING USING INTERACTIVE WEB-BASED MAPPINGR01CE001615 · CE · UNIVERSITY OF PENNSYLVANIA · PI BRANAS, CHARLES C. · 2009 to 2011
$684k
Studies of space-time activity patterns and fear in urban landscapesK02AA017974 · NIAAA · UNIVERSITY OF PENNSYLVANIA · PI WIEBE, DOUGLAS J · 2009 to 2013
$666k
Reducing mortality attributable to cardiac and pulmonary complications after traumatic injury: understanding the role of failure-to-rescueK08HL131995 · NHLBI · UNIVERSITY OF PENNSYLVANIA · PI HOLENA, DANIEL NORMAN · 2016 to 2018
$509k
AHRQ HHS K08 HS017960NCIPC CDC HHS R01 CE001615NCIPC CDC HHS R49 CE002474NHLBI NIH HHS K08 HL131995NIAAA NIH HHS K02 AA017974
6 · The paper itself

Abstract

backgroundInjury is a major contributor to morbidity and mortality in the United States. Accordingly, expanding access to trauma care is a Healthy People priority. The extent to which disparities in access to trauma care exist in the US is unknown. Our objective was to describe geographic, demographic, and socioeconomic disparities in access to trauma care in the United States.

methodsCross-sectional study of the US population in 2010 using small units of geographic analysis and validated estimates of population access to a Level I or II trauma center within 60minutes via ambulance or helicopter. We examined the association between geographic, demographic, and socioeconomic factors and trauma center access, with subgroup analyses of urban-rural disparities.

resultsOf the 309 million people in the US in 2010, 29.7 million lacked access to trauma care. Across the country, areas with higher income were significantly more likely to have access (OR 1.30, 95% CI 1.12-1.50), as were major cities (OR 2.13, 95% CI 1.25-3.62) and suburbs (OR 1.27, 95% CI 1.02-1.57). Areas with higher rates of uninsured (OR 0.09, 95% CI 0.07-0.11) and Medicaid or Medicare eligible patients (OR 0.69, 95% CI 0.59-0.82) were less likely to have access. Areas with higher proportions of blacks and non-whites were more likely to have access (OR 1.37, 95% CI 1.19-1.58), as were areas with higher proportions of Hispanics and foreign-born persons (OR 1.51, 95% CI 1.13-2.01). Overall, rurality was associated with significantly lower access to trauma care (OR 0.20, 95% CI 0.18-0.23).

conclusionWhile the majority of the United States has access to trauma care within an hour, almost 30 million US residents do not. Significant disparities in access were evident for vulnerable populations defined by insurance status, income, and rurality.

Indexed as

Trauma CentersCross-Sectional StudiesFemaleHealthcare DisparitiesHealth Services AccessibilityHumansInsurance CoverageMaleRural PopulationTime-to-TreatmentUnited StatesUrban PopulationHealthcare disparitiesHealth services geographic accessibilityHealth services researchTrauma centers

Identifiers

PMID28069138
PMCPMC5292279

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.