The Glasgow Outcome Score attempts to objectively assess outcomes of brain injury by degree of recovery. It makes use of five categories. The first version was developed in 1975 by Jennett and Bond. An alternative quantification of outcomes in common use is the Modified Rankin Scale.

1. Death	Severe injury or death without recovery of consciousness
2. Persistent vegetative state	Severe damage with prolonged state of unresponsiveness and a lack of higher mental functions
3. Severe disability	Severe injury with permanent need for help with daily living
4. Moderate disability	No need for assistance in everyday life, employment is possible but may require special equipment.
5. Low disability	Light damage with minor neurological and psychological deficits.