Use of Rotterdam CT scores for mortality risk stratification in children with traumatic brain injury.

OBJECTIVES: The Rotterdam CT score refined features of the Marshall score and was designed to categorize traumatic brain injury type and severity in adults. The objective of this study was to determine whether the Rotterdam CT score can be used for mortality risk stratification after pediatric traumatic brain injury. DESIGN: In children with moderate to severe traumatic brain injury, a comparison of observed versus predicted mortality was calculated using published model probabilities of adult mortality. Development and validation of a new pediatric mortality model using randomly selected prediction and validation samples from our cohort. SETTING: A single level 1 pediatric trauma center. SUBJECTS: Six hundred thirty-two children with moderate or severe traumatic brain injury. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Sixteen percent of the patients (101 of 632) died prior to hospital discharge. The predicted mortality based on Rotterdam score for adults with moderate or severe traumatic brain injury discriminated pediatric observed mortality well (area under the curve = 0.85; 95% CI, 0.80-0.89) but had poor calibration, overestimating or underestimating mortality for children in several Rotterdam categories. A predictive model based on children with moderate or severe traumatic brain injury from the single center discriminated mortality well (area under the curve, 0.80; 95% CI, 0.68-0.91) and showed good calibration and overall fit. CONCLUSIONS: Children with traumatic brain injury have better survival than adults in Rotterdam CT score categories representing less severe injuries but worse survival than adults in higher score categories. A novel, validated pediatric mortality model based on the Rotterdam score is accurate in children with moderate or severe traumatic brain injury and can be used for risk stratification.