title: Geographic variation in preventable deaths from motor vehicle crashes.
abstract: OBJECTIVE
  In Michigan, drivers in rural motor vehicle crashes (MVCs) are twice as likely to die as nonrural drivers: this could be due to variation in the quality of acute trauma care. This study tests the hypothesis that the preventable death rate (PDR) is higher and that anatomic injury severity is lower for rural compared to nonrural MVC fatalities.
  
  
  METHODS
  Retrospective cohort study.
  
  
  METHODS
  Autopsy results from MVC victims of three rural counties and one nonrural county were reviewed. The time period was 1986-1991. Using the Abbreviated Injury Scale, 1985 version (AIS-85), Injury Severity Scores (ISSs) and Anatomical Profile G scores were calculated. Preventability was determined based on ISSs (< 59) and AIS scores in the head region (< 5). Student's t test and the chi-squared test were used for analysis; a p value of < 0.05 was considered statistically significant.
  
  
  RESULTS
  143 rural and 306 nonrural fatalities were analyzed. The rural PDR was 37.1% and nonrural 48.0% (p < 0.05). ISSs and also G scores were significantly different between rural (54.8; -2.1) and nonrural (50.2; -1.2) areas.
  
  
  CONCLUSIONS
  This study suggests that regional variation in the quality of acute trauma care is not a significant factor in regional variation in MVC mortality.
authors.affiliation: Department of Surgery, University of Michigan, Ann Arbor.
authors.forename: B
authors.initials: B
authors.lastname: Chen
authors.forename: R F
authors.initials: RF
authors.lastname: Maio
authors.forename: P E
authors.initials: PE
authors.lastname: Green
authors.forename: R E
authors.initials: RE
authors.lastname: Burney
mesh_terms: D000063:Accidents, Traffic / Q000401:mortality*; D000328:Adult; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D008824:Michigan / Q000453:epidemiology; D012189:Retrospective Studies; D012424:Rural Population; D015599:Trauma Severity Indices