Association between upper extremity injuries and side airbag availability.
BACKGROUND
The availability of automotive airbags continues to increase in an effort to reduce traffic fatalities. Their benefits do not come without consequences, as front and side airbags have been linked to upper and lower extremity injuries. This study sought to test the hypothesis that occupants of vehicles equipped with side airbags, involved in side impact motor vehicle collisions, have an increased risk of upper extremity injury when compared with occupants of vehicles without side airbags.


METHODS
The risk of upper extremity injury in side impact collisions was compared between vehicles with and without side airbags using data obtained from the 1995-2004 Crashworthiness Data System, a dataset maintained by the National Highway Traffic Safety Administration. We assessed the risk of upper extremity injury as classified by Abbreviated Injury Scale score, 1990 Revision.


RESULTS
Although there was no association between side airbag availability and the risk of upper extremity injury overall [risk ratio (RR) 1.08; 95% confidence interval (CI) 0.85-1.36], the risk of a moderate or serious upper extremity injury (Abbreviated Injury Scale score >/=2 or >/=3 injury) was significantly increased (RR 2.75, 95% CI 1.10-6.83 and RR 2.45, 95% CI 1.00-5.96, respectively). The risk of dislocation was also increased (RR 2.42, 95% CI 1.26-4.64), although there was no difference in the risk of fracture (RR 1.00, 95% CI 0.53-1.89).


CONCLUSIONS
The forces generated by airbag deployment may explain the increase in upper extremity injuries observed in vehicles equipped with side airbags. This increased risk must be balanced against other research suggesting reduced risks for head and thoracic injury.
McGwin
Gerald
G
Center for Injury Sciences at UAB, and Surgical Critical Care, Division of General Surgery, Department of Surgery, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA. mcgwin@uab.edu
Modjarrad
Kayvon
K
Duma
Stefan
S
Rue
Loring W
LW
D015998:Abbreviated Injury Scale; D000063:Accidents, Traffic / Q000706:statistics & numerical data*; D000328:Adult; D017278:Air Bags / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D012306:Risk; D014481:United States; D034941:Upper Extremity / Q000293:injuries*