Obesity is a predictor of abdominal computed tomography imaging in pediatric trauma patients

BACKGROUND Computed tomography (CT) has helped to reduce the morbidity due to missed injuries. However, CT imaging is associated with radiation exposure and thus has limited indications in pediatric patients. In this study, we aimed to identify the association between obesity and abdominal CT imaging in pediatric trauma patients. METHODS We performed a 4-year retrospective analysis of the American College of Surgeons Trauma Quality Improvement 2017-2020. We identified all pediatric trauma patients aged between 7 and 17 years presenting with isolated abdominal trauma (nonabdominal Abbreviated Injury Scale score, 0). We excluded patients undergoing hemorrhage control surgeries and those with missing information in height and weight. Patients were stratified by body mass index into four groups (underweight, normal, overweight, and obese [body mass index, ≥30 kg/m2]). Outcomes were predictors of undergoing CT imaging of the abdomen. Descriptive statistics and multivariable logistic regression analyses were performed. RESULTS We identified a total of 10,204 pediatric trauma patients. The mean age was 13 years, 68% were male, and 77% were White. The median abdominal Abbreviated Injury Scale score in all the four groups was 2. On univariate analysis, underweight patients had lowest rates (25%), whereas obese patients had highest rates of CT imaging (38%) (p < 0.001). On multivariable regression analysis, increasing age (adjusted odds ratio [aOR], 1.08; 95% confidence interval [CI], 1.06-1.10; p < 0.001), male sex (aOR, 1.14; 95% CI, 1.03-1.26; p = 0.009), White race (aOR, 0.84; 95% CI, 0.76-0.92; p < 0.011), penetrating injury (aOR, 1.16; 95% CI, 1.03-1.32; p = 0.017), obesity (aOR, 1.30; 95% CI, 1.07-1.57; p = 0.008), and management at American College of Surgeons level II (aOR, 1.63; 95% CI, 1.44-1.85; p < 0.001) and level III or lower centers (aOR, 1.17; 95% CI, 1.06-1.26; p = 0.002) were identified as independent predictors of receiving CT imaging. CONCLUSION Obesity is associated with increased odds of undergoing CT imaging in pediatric trauma patients independent of injury characteristics. Future efforts to define the appropriate indications for CT imaging in pediatric trauma patients are warranted to reduce the adverse effects of CT radiation. LEVEL OF EVIDENCE Prognostic and Epidemiological; Level III.