Geographic cluster analysis of injury severity and hospital resource use in a regional trauma system

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Objectives. To determine clusters of trauma incidents with high injury severity and resource utilization and to test their association with census demographic information. Methods. Using "trauma band" unique identifiers and probabilistic linkage for unmatched cases, we matched injury location information collected from a centralized regional trauma communications center to the state trauma system registry for patients directly transported to two level I trauma centers for the years 20012003 in a three-county area. The injury locations were aggregated at the census tract level using a geographic information system (GIS). Moran's I analysis was used to determine clusters of census tracts that had a high incidence of either total trauma injuries, Injury Severity Scores (ISSs) >15, or high resource use (in-hospital mortality, admission to the intensive care unit, or major nonorthopedic surgery). These clusters were then tested for association with census tract demographics using logistic regression. Results. Eight thousand seven hundred fifty-one injured persons were directly transported from the tricounty area to a trauma center during the study period. The mean (± standard deviation) age was 37 ± 21 years, 67.4 were male, 18.9 had ISSs >15, and 29.8 had a high-resource-use indicator. Moran's I analysis demonstrated a single large cluster of incidents for total injuries, ISS >15, and occurrence of a high-resource-use indictor that overlapped except for one small census tract. Logistic regression revealed that the high-risk cluster was associated with a higher prevalence of nonwhite population and vacant housing and a lower prevalence of foreign-born residents and family housing. Conclusions. GIS cluster analysis demonstrated high-risk census tracts for trauma incidents and associated population demographics. Geospatial analyses may assist injury prevention interventions and emergency medical services deployment strategies for trauma.

Original languageEnglish (US)
Pages (from-to)137-144
Number of pages8
JournalPrehospital Emergency Care
Volume14
Issue number2
DOIs
StatePublished - 2010

Fingerprint

Cluster Analysis
Wounds and Injuries
Censuses
Injury Severity Score
Trauma Centers
Geographic Information Systems
Demography
Logistic Models
Emergency Medical Services
Hospital Mortality
Population
Intensive Care Units
Registries
Communication
Incidence

Keywords

  • Cluster analysis
  • Geographic information systems
  • GIS
  • Morans I analysis
  • Severity
  • Trauma

ASJC Scopus subject areas

  • Emergency Medicine
  • Emergency
  • Medicine(all)

Cite this

Geographic cluster analysis of injury severity and hospital resource use in a regional trauma system. / Warden, Craig; Sahni, Ritu; Newgard, Craig.

In: Prehospital Emergency Care, Vol. 14, No. 2, 2010, p. 137-144.

Research output: Contribution to journalArticle

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