Psychometric analysis of the Glasgow Coma Scale and its sub-scale scores in a national retrospective cohort of patients with traumatic injuries

To determine the psychometric validity, using Rasch analysis, of summing the three constituent parts of the Glasgow Coma Scale (GCS). National (registry-based) retrospective study. England and Wales. All individuals who sustained a traumatic injury and were: admitted for more than three days; requir...

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