The safety implications of vehicle seat adjustments.
BACKGROUND
The goal of this study was to gather information on the preferred front seat position of vehicle occupants and to determine the impact of variation in seat position on safety during crashes.


METHODS
The study evaluated the relationship between seat position and occupant size using the chi-square test and compared the risk of severe injury for small females and large males with regard to forward and rearward seat position using logistic regression.


RESULTS
While smaller drivers sat closer to the steering wheel than larger drivers, front passengers of all sizes used similar seat positions. Additionally, the risk of injury was higher for small, unbelted females in rearward seat positions and large males (belted and unbelted) in forward seat positions.


CONCLUSIONS
Occupants who adjust their seats to positions that are not consistent with required federal tests are at a greater risk for severe injury in a crash.
Hill
John D
JD
Department of Mechanical and Industrial Engineering, and Public Policy Center, The University of Iowa, 3131 Seamans Center, Iowa City, 52242, USA.
Boyle
Linda Ng
LN
D000063:Accidents, Traffic; D000465:Algorithms; D001336:Automobiles; D001696:Biomechanical Phenomena; D049628:Body Size; D016009:Chi-Square Distribution; D005260:Female; D006801:Humans; D008297:Male; D011187:Posture / Q000502:physiology*; D018570:Risk Assessment; D012307:Risk Factors; D012449:Safety; D012622:Seat Belts; D012737:Sex Factors; D014947:Wounds and Injuries / Q000517:prevention & control*