From Part 2, Graphical Presentation of Possibilities (image) Journal of Neurosurgery Publishing Group Share Print E-Mail Caption GCS-PA CT prediction charts for the probability of mortality six months after head injury based on the patient's admission GCS-P (derived as the GCS sum score minus the number of nonreactive pupils) and age with no CT abnormality (A), exactly one CT abnormality (B), and two or more CT abnormalities (C). The category CT abnormalities comprises intracranial hematoma, absent cisterns, and SAH. Credit Copyright 2018 American Association of Neurological Surgeons. Usage Restrictions Permission for reuse must be obtained from the journal. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.