The present study aims at providing reference values from the general pediatric population for the German version of the 21-item self-report post version of the Postconcussion Symptom Inventory for adolescents aged 13–17 years (PCSI-SR13) following pediatric traumatic brain injury (pTBI). A total of N = 950 adolescents completed an adapted version of the PCSI-SR13. Prior to establishing reference values using percentiles, psychometric properties (i.e., reliability and factorial validity) and regression analyses were examined to identify factors contributing to PCSI-SR13 scores. In addition, construct assessment in the general population sample was compared to that in the pTBI sample (N = 234) using measurement invariance analyses and direct comparisons at the score levels. The results indicate good reliability (Cronbach’s α and McDonald’s ω of 0.97 each). The four-factor structure covering physical, emotional, cognitive, and fatigue symptom groups could be replicated with χ2(183) = 995.96, p < 0.001, χ2/df = 5.44, CFI = 0.99, TLI = 0.98, RMSEA (90% CI) = 0.068 (0.064, 0.073), SRMR = 0.03. With minor restrictions, the assessment of symptoms was comparable between the general population and the pTBI samples. Participants in the pTBI sample reported a significantly higher symptom burden than those in the general population sample. Reference values were provided using the total sample without further stratification. Conclusion: For the German post version of the PCSI-SR13, reference values are now available for direct score comparisons and for drawing conclusions about the clinical relevance of the reported symptoms, while considering the prevalence in a comparable general population without a history of pTBI.Trial registration: The study is retrospectively registered in the German Clinical Trials Register and in the International Clinical Trials Registry Platform (ID DRKS00032854).
What is Known:
• Pediatric traumatic brain injury (pTBI) is a major cause of death and disability, with a wide range of incidence rates and symptoms that interfere with daily functioning and recovery.• The Postconcussion Symptom Inventory (PCSI), including recently translated and validated German versions, is a recommended tool for measuring self-reported symptoms in affected children and adolescents.
What is New:
• This study provides German-specific reference values for the PCSI-SR13, allowing health care professionals to better differentiate between symptoms that may occur in the general adolescent population with and without chronic health conditions and those caused by pTBI.• It highlights that adolescents with chronic health conditions but without a history of pTBI often report higher levels of emotional symptoms and fatigue, emphasizing the importance of a nuanced clinical assessment, including medical history.