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Although previous research has linked poor seat belt fit to abdominal organ injury for children, few have studied the pattern of pediatric abdominal injuries and its relationship to key characteristics beyond this primary association. In this study, data were obtained from a probability sample of 19,125 children, representing 243,540 children, under age 16 years who were enrolled in an on-going crash surveillance system which links insurance claims data to validated telephone survey and crash investigation data. The risk of AIS2+ abdominal injury was estimated for various crash, restraint, vehicle and child correlates and multivariate logistic regression was used to identify the relative importance of these predictors. Children 4–8 years of age were at the highest risk of abdominal injury: they were 24.5 times and 2.6 times more likely to sustain an AIS2+ abdominal injury than those 0–3 years and 9–15 years, respectively.

Restrained children between the ages of 3 to 15 years in crashes were identified in an on-going crash surveillance system (1998-2002) which links insurance claims data to telephone survey and crash investigation data. The risk of upper extremity injury associated with airbag deployment was estimated and a series of cases was examined using in-depth crash investigation to identify the mechanisms of these injuries. This study found that 3.5% of children who were exposed to a passenger airbag (PAB) received an upper extremity fracture, making them 2.5 times as likely to sustain an upper extremity fracture than children in similar crashes who were not exposed to a PAB. Female children were 2.2 times as likely to receive an isolated upper extremity fracture when exposed to a PAB than male children. The incidence rate, gender difference, and injury mechanism in children all appear to be similar to those of adults.

Little is known about the mechanism of pelvic injury in the pediatric population, an age range over which the pelvis undergoes tremendous structural change. We hypothesize that these structural changes influence pelvic fracture injury mechanisms. A probability sample of children under age 16 years in crashes were enrolled in an on-going crash surveillance system which links insurance claims data to telephone survey and crash investigation data. 15,725 children in side impact collisions were studied. Risk of pelvic fracture in side impact collisions was estimated and factors associated with these injuries were identified. Eight cases were examined using in-depth investigation to identify the injury mechanisms. Of our study sample, 0.10% of children suffered a pelvic fracture. The typical child with a pelvic fracture was a 12-15 year old female front row occupant of a passenger car involved in a struck side collision with intrusion.