On its 40th anniversary (in 2014) the GCS was updated by Prof Teasdale, one of the original developers. He also advised against combining the components if one aspect was non-testable (testing verbal response in an intubated patient, for example). Earlier this year he wrote another paper with the aim of increasing the prognostic accuracy of the GCS while losing none of its simplicity.

Journal of Neurosurgery, June 2018