Table 1.1 Definitions of Injury Severity by ERABI | Sep 11, 2019 Table 1.1 Definitions of Injury Severity Mild Moderate Severe Very Severe PTA <1hr GCS 13-15 LOC <15 minutes PTA 1-24 hours GCS 9-12 LOC <6 hours PTA 1-7 days GCS between 3-8 LOC 6-48 hours PTA >7 days LOC >48 hours