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External Validation of the PediBIRN Screening Tool for Abusive Head Trauma in Pediatric Emergency Department Settings
Kent P Hymel1, Amanda K Fingarson, Mary Clyde Pierce
1From the Department of Pediatrics, Penn State Health Children's Hospital, Penn State College of Medicine, Hershey, PA.
Insights
The PediBIRN-4 tool shows high sensitivity for detecting abusive head trauma (AHT) in young children but has lower specificity. A simplified 3-variable tool may be better for emergency departments.
Area of Science:
- Pediatric Emergency Medicine
- Forensic Pediatrics
- Clinical Decision Tools
Background:
- Abusive head trauma (AHT) is a significant concern in young children.
- Accurate screening tools are crucial for timely diagnosis and intervention.
- Existing tools require validation in diverse clinical settings.
Purpose of the Study:
- To evaluate the performance of the PediBIRN 4-variable clinical data repository (CDR) tool for screening AHT in pediatric patients.
- To assess the sensitivity, specificity, and likelihood ratios of the PediBIRN-4 tool.
Main Methods:
- Retrospective analysis of a deidentified prospective dataset of patients under 3 years with bruising and confirmed acute head trauma.
- Expert medical panel previously identified cases of AHT.
- Calculation of screening performance measures (sensitivity, specificity, likelihood ratios) with 95% confidence intervals.
Main Results:
- The PediBIRN-4 tool demonstrated high sensitivity (0.96) for AHT detection.
- Specificity was lower (0.29), with a positive likelihood ratio of 1.35 and negative likelihood ratio of 0.13.
- Removing one variable could significantly improve specificity to 0.84.
Conclusions:
- The PediBIRN-4 CDR exhibits high sensitivity for AHT screening in pediatric emergency departments, comparable to inpatient settings.
- However, its specificity is a limitation in the ED setting.
- Further research into a simplified 3-variable PediBIRN tool for ED use is recommended.
Methods:
We conducted a retrospective, secondary analysis of an existing, deidentified, prospective data set captured to derive a bruising CDR. Subjects were patients under 3 years with bruising and confirmed acute head trauma. An expert medical panel had previously identified patients with AHT. Measures of the CDR's AHT screening performance (sensitivity, specificity, likelihood ratios) were calculated with 95% confidence intervals (CIs).
Results:
Expert medical panel members had classified 78 of 117 eligible patients (67%) as AHT, 38 (33%) as non-AHT, and 1 as indeterminate. Excluding the indeterminate case, the PediBIRN-4 demonstrated a sensitivity of 0.96 (95% CI, 0.88-0.99), specificity of 0.29 (95% CI, 0.16-0.46), positive likelihood ratio of 1.35 (95% CI, 1.10-1.67), and negative likelihood ratio of 0.13 (95% CI, 0.04-0.46). Close inspection of the data revealed that 1 of the CDR's predictor variables had lowered specificity without impacting sensitivity. Eliminating this variable would have increased specificity to 0.84 (95% CI, 0.68-0.93).
Conclusions:
The PediBIRN 4-variable CDR demonstrated AHT screening sensitivity in the pediatric ED equivalent to pediatric intensive care unit and other inpatient settings, but lower specificity. Further study of a simplified 3-variable PediBIRN AHT screening tool for the ED setting is warranted.
