Translation and interrater reliability of the structured interview for the extended glasgow outcome scale among Moroccan patients with traumatic brain injury

Objective: The Extended Glasgow Outcome Scale (GOSE) is a commonly used assessment tool to evaluate the outcome following traumatic brain injury (TBI). This study aims to evaluate the applicability of the GOSE structured interview in the Moroccan context and to examine its reliability. Methods: In this prospective validation study, we assessed the inter-rater reliability of GOSE scoring for 123 TBI patients who attended Avicenna University Hospital's outpatient unit. Interrater agreement of the GOSE was assessed, with Cohen's weighted kappa, between the rater with the structured interview and the rater without the structured interview and between the rater specialized in TBI and the non-specialized rater. Results: The findings demonstrated a high level of agreement (weighted kappa = 0.96) between the rater specialized in TBI and the non-specialized rater with (p < 0.001) and a high level of agreement (weighted kappa = 0.85) between the rater with the structured interview and the neurosurgeon without the structured interview. The Moroccan version is capable of assessing the GOSE Score at a level similar to the original version. Conclusion: The use of this version has the potential to expedite the process of evaluating outcomes in patients with TBI in both clinical practice and research settings.