Association between side-impact airbag deployment and risk of injury: A matched cohort study using the CIREN and the NASS-CDS

BACKGROUND Side-impact airbags (SABs) are designed to protect the head and thorax during a side-impact motor vehicle collision (MVC). Research on the effectiveness of SAB deployment has been limited. The objective of this study was to assess the effectiveness of deployed SABs in reducing head and thoracic injuries during side-impact MVCs. METHODS The 2000–2009 National Automotive Sampling System-Crashworthiness Data System and the Crash Injury Research Engineering Network databases were used to evaluate front seat occupants involved in side-impact MVCs using a matched cohort study design. The risk of serious head and thoracic injuries for occupants with and without deployed SABs were compared. RESULTS Occupants in vehicles with a deployed SAB designed to protect the head had a 30% lower risk of head injuries with an Abbreviated Injury Scale score of 2+ (relative risk [RR], 0.70; 95% confidence interval [CI], 0.51–0.97). Regarding thoracic injury, occupants in vehicles with a deployed SAB designed to protect the torso had a risk of injury similar to that of occupants without a deployed SAB (RR, 0.99; 95% CI, 0.79–1.24), although the risk increased for occupants 50 years and older (RR, 1.27; 95% 0.84–1.93). CONCLUSION The results of the current suggest that although SABs protect occupants from head injury, the protective effect for thoracic injury is limited. Future research should focus on whether the association with thoracic injury is modified by occupant seating posture. LEVEL OF EVIDENCE Prognostic study, level III.

[1]  David C Viano,et al.  The Field Performance of Frontal Air Bags: A Review of the Literature , 2005, Traffic injury prevention.

[2]  P. Layde,et al.  The Association of Driver Age with Traffic Injury Severity in Wisconsin , 2009, Traffic injury prevention.

[3]  Jason J. Hallman,et al.  Thoracic Injury Metrics With Side Air Bag: Stationary and Dynamic Occupants , 2010, Traffic injury prevention.

[4]  Matthew R. Maltese,et al.  THREE-YEAR-OLD CHILD OUT-OF-POSITION SIDE AIRBAG STUDIES , 1999 .

[5]  Joel D Stitzel,et al.  Investigating the effects of side airbag deployment in real-world crashes using crash comparison techniques. , 2011, Annals of advances in automotive medicine. Association for the Advancement of Automotive Medicine. Annual Scientific Conference.

[6]  Thomas P Wenzel,et al.  The effects of vehicle model and driver behavior on risk. , 2005, Accident; analysis and prevention.

[7]  Gerald McGwin,et al.  Association between side air bags and risk of injury in motor vehicle collisions with near-side impact. , 2003, The Journal of trauma.

[8]  Narayan Yoganandan,et al.  Biomechanics of side impact: injury criteria, aging occupants, and airbag technology. , 2007, Journal of biomechanics.

[9]  Gerald McGwin,et al.  The influence of side airbags on the risk of head and thoracic injury after motor vehicle collisions. , 2004, The Journal of trauma.

[10]  Narayan Yoganandan,et al.  Door velocity and occupant distance affect lateral thoracic injury mitigation with side airbag. , 2011, Accident; analysis and prevention.

[11]  Aloke Prasad,et al.  EVALUATION OF INJURY RISK FROM SIDE IMPACT AIR BAGS , 2001 .

[12]  Narayan Yoganandan,et al.  Lateral impact injuries with side airbag deployments--a descriptive study. , 2007, Accident; analysis and prevention.

[13]  Michael J Kallan,et al.  Differential risk of injury in child occupants by passenger car classification. , 2003, Annual proceedings. Association for the Advancement of Automotive Medicine.

[14]  Michael R Elliott,et al.  Appropriate analysis of CIREN data: using NASS-CDS to reduce bias in estimation of injury risk factors in passenger vehicle crashes. , 2010, Accident; analysis and prevention.

[15]  Gerald McGwin,et al.  Association between upper extremity injuries and side airbag availability. , 2008, The Journal of trauma.

[16]  Elisa R Braver,et al.  Efficacy of side air bags in reducing driver deaths in driver-side collisions. , 2004, American journal of epidemiology.

[17]  Anne T. McCartt,et al.  Efficacy of Side Airbags in Reducing Driver Deaths in Driver-Side Car and SUV Collisions , 2007, Traffic injury prevention.