We describe the characteristics and outcomes of pediatric traumatic out-of-hospital cardiac arrest after traffic accidents and validate the termination of resuscitation clinical criteria for adult traumatic out-of-hospital cardiac arrest in pediatrics. Methods: We analyzed the records of pediatric (18 years) traumatic out-of-hospital cardiac arrest cases after traffic accidents in a prospectively collected nationwide database (2012 to 2016). Endpoints were 1-month favorable neurologic outcomes and 1month survival. Validation of termination of resuscitation criteria, cardiac arrest at the scene, and unsuccessful resuscitation after cardiopulmonary resuscitation (CPR) greater than 15 minutes was performed based on specificity and positive predictive value. Results: Of the 582 patients who were eligible for analyses, 8 (1.4%) and 20 (3.4%) had 1-month favorable neurologic outcome and survival, respectively. All patients with favorable neurologic outcomes had out-of-hospital return of spontaneous circulation, and the duration of CPR was significantly shorter than for those with unfavorable neurologic outcomes (4 versus 23 minutes; absolute difference-21.9 minutes; 95% confidence interval-36.3 to-7.4 minutes). The duration of out-of-hospital CPR beyond which the possibility of favorable neurologic outcomes and survival diminished to less than 1% was 15 minutes. For predicting unfavorable neurologic outcomes, the termination of resuscitation criteria provided a specificity of 1.00 (95% confidence interval 0.52 to 1.00) and a positive predictive value of 1.00 (95% confidence interval 0.99 to 1.00). Conclusion: The outcomes of pediatric patients with traumatic out-of-hospital cardiac arrest after traffic accidents were as poor as those of adults in previous studies. Out-of-hospital return of spontaneous circulation was a significant indicator of favorable outcomes, and the duration of out-of-hospital CPR beyond which the possibility of favorable neurologic outcomes and survival diminished to less than 1% was 15 minutes. Termination of resuscitation criteria provided an excellent positive predictive value for 1-month unfavorable neurologic outcomes after out-of-hospital cardiac arrest. [