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The Wessex Head Injury Matrix (WHIM) main scale: a preliminary report on a scale to assess and monitor patient recovery after severe head injury

University of Southampton Rehabilitation Research Unit, Southampton, UK

S A Horn

Department of Psychology, University of Southampton, Southampton, UK

B A Wilson

MRC-CBU, Addenbrookes Hospital, Cambridge, UK

M J Watson

Occupational Therapy and Physiotherapy, School of Health, University of East Anglia, Norwich, UK

M J Campbell

ScHARR, Community Sciences Centre, North General Hospital, Sheffield, UK

D L Mclellan

University of Southampton Rehabilitation Research Unit, Southampton General Hospital, Southampton, UK

Objective: To develop a behavioural assessment based on observations of patients recovering after severe head injury whereby data could be collected by observation and by testing everyday tasks.

Design: A prospective observational study of a cohort of 88 consecutive hospital admissions with severe head injury.

Setting: Two district general hospitals in the UK.

Patients: Eighty-eight consecutive admissions with severe traumatic head injury. Ages ranged from 14 to 67 years, mean coma duration was 14 days and mean duration of post traumatic amnesia (PTA) was 56 days.

Results: Fifty-eight items of behaviour were identified. Paired preference analysis was used to identify a sequence of recovery of these behaviours. The sequence began with arousal and led on to behaviours signalling recovery of social interaction and communication. Subsequent behaviours indicated increasing cognitive organization and return of orientation and memory. The behaviours on the scale are hierarchical and range from coma to emergence from PTA.

Conclusions: A scale to assess patients and monitor cognitive recovery after severe head injury has been developed. While individual patients will show some departures from the sequence identified, the scale helps to make explicit the earliest stages of natural recovery patterns after head injury.

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