The Edinburgh Extended Glasgow Outcome Scale (EEGOS): rationale and pilot studies.

The Glasgow Outcome Scale (GOS) is the most widely used outcome measure in head injury research. However, it is a global and relatively insensitive measure, precluding any description of the types of impairments that lead to the disability. The Edinburgh Extended Glasgow Outcome Scale (EEGOS) was devised as a new outcome measure that retains the advantages of the existing GOS but allows comparison of patterns of recovery in different areas of function; behavioural, cognitive and physical. This report describes pilot studies of the EEGOS used retrospectively, and in 'live' face-to-face interviews. The results show raw percentage agreements of 45%, 60% and 70% in the retrospective study, and 83%, 78% and 83% in the 'live' study. These results demonstrate that the inter-rater reliability of the EEGOS is comparable to that of the GOS applied in similar situations.