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IJE Advance Access originally published online on February 27, 2009
International Journal of Epidemiology 2009 38(4):1128-1134; doi:10.1093/ije/dyp143
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Published by Oxford University Press on behalf of the International Epidemiological Association © The Author 2009; all rights reserved.

Association of age, sex and seat belt use with the risk of early death in drivers of passenger cars involved in traffic crashes

Pablo Lardelli-Claret1,*, Elena Espigares-Rodríguez1, Carmen Amezcua-Prieto1, José Juan Jiménez-Moleón1, Juan de Dios Luna-del-Castillo2 and Aurora Bueno-Cavanillas1

1Departamento de Medicina Preventiva y Salud Pública, Universidad de Granada, Granada, Spain.
2Departamento de Estadística e Investigación Operativa, Universidad de Granada, Granada, Spain.

*Corresponding author. Pablo Lardelli-Claret, Departamento de Medicina Preventiva y Salud Pública, Universidad de Granada, Facultad de Farmacia s/n, 18071 Granada, Spain. E-mail: lardelli{at}ugr.es


  Abstract

Background This study was designed to break down the association of age, sex and seat belt use with risk of death for drivers of automobiles involved in a crash into two theoretical components: intrinsic severity of the crash and occupant resilience.

Methods We studied all 84 338 pairs of drivers and front-seat passengers aged >=18 years in passenger cars involved in traffic crashes with victims recorded in the Spanish traffic crash registry between 2000 and 2004. Relative risks (RR) for the association of age, male sex and non-seat belt use with risk of death were calculated with Poisson conditional and unconditional multiple regression models.

Results For drivers, the risk of death associated with severity of the crash was slightly higher in men (RR = 1.18), and decreased with age (RR = 0.993 per year). However, resilience-dependent risk of death increased with age (RR = 1.028 per year), and especially among unbelted occupants (RR = 4.02).

Conclusions We conclude that in drivers involved in traffic crashes the association of age, sex and seat belt use with risk of death depends on the component of risk considered: severity of the crash or the occupant's resilience to energy.

Keywords Accidents, traffic, mortality, methods, risk factor, seat belts, age, sex

Accepted 23 January 2009


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