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Severity

Classification GCS Score Duration of Coma Length of PTA
Severe 3–8 Over 6 hours Over 24 hours
Moderate 9–12 Less than 6 hours 1–24 hours
Mild 13–15 20 minutes or less 60 minutes or less

Reprinted with permission from: Sohlberg, M. M, & Mateer, C. A. (2001). Cognitive rehabilitation: An integrative neuropsychological approach. NY: Guilford Press.


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