Survival in fatal road crashes: body mass index, gender, and safety belt use.
BACKGROUND
This study evaluated the associations of body mass index (BMI), gender, and use of safety belts with the survival of drivers involved in fatal road crashes.


METHODS
The census data of all U.S. fatal crashes that did not involve pedestrians, bicyclists, or motorcyclists were examined for an 11-year period.


RESULTS
If involved in a crash with one or more fatalities, the odds of female drivers being among the fatalities are 1.28 times higher than those of male drivers, and the odds of unbelted drivers being among the fatalities are 5.43 times higher than those of belted drivers. The relationship of survivability to BMI depends on the gender and safety belt use of the driver.


CONCLUSIONS
For male drivers, increased BMI appears beneficial when safety belts are used but detrimental when not used. For belted female drivers, normal BMI is associated with the lowest odds of being killed, and both increased and decreased BMIs increase the odds. For unbelted female drivers, no reliable trends were present among the BMI categories.
Sivak
Michael
M
The University of Michigan Transportation Research Institute, Ann Arbor, MI 48109-2150, USA. sivak@umich.edu
Schoettle
Brandon
B
Rupp
Jonathan
J
D000063:Accidents, Traffic / Q000401:mortality*; D015992:Body Mass Index; D005260:Female; D006801:Humans; D008297:Male; D016017:Odds Ratio; D012307:Risk Factors; D012622:Seat Belts / Q000706:statistics & numerical data*; D012737:Sex Factors; D015996:Survival Rate; D014481:United States / Q000453:epidemiology