This paper reports on a development of the Rivermead Motor Assessment Gross Function scale, the Rivermead Mobility Index (RMI), a new measure of mobility disability which concentrates on body mobility. An early development included a second scale concentrating on elective mobility, but the results showed this to be unreliable. The RMI comprises a series of 14 questions and one direct observation, and covers a range of activities from turning over in bed to running. Its inter-observer reliability was tested on two groups of patients (n = 23 and 20 respectively) and it is reliable to a limit of 2 points (out of 15). Its validity as a measure of mobility after head injury and stroke was tested by concurrent measurement of mobility using gait speed and endurance, and by standing balance. The RMI does form a scale. It is short, simple, and clinically relevant, and can be used in hospital or at home.

This paper investigates the reliability of six measures of impairment and disability related to mobility after stroke: the Rivermead Motor Assessment (RMA, gross function subsection); gait speed (over 5 and 10 m); the motricity index (leg scores only); functional ambulation categories; sitting to standing (by observation); and mobility categories. Twenty-five patients who had suffered a stroke 2-6 years earlier leaving them with mobility disability were seen as part of a home-based physiotherapy trial. Assessments were made by three people on three occasions over 5 weeks. All six measures were reliable in statistical terms. A variation in gait speed of up to 25% and a difference of 3 points in the RMA were the actual limits of reliability.

We acknowledge the help of all the immunisation workers of the child health programme of the ICDDR,B, and the WHO expanded programme on immunisation, and the patients who gave us their time and cooperation. We also acknowledge the expanded programme on immunisation for the necessary logistics for immunisation. We are grateful to Mr M A Hasnat for his assistance with data analysis, Mr A R Patwary for invaluable help, and Dr Mridul K Chowdhury for his comments. We also express our sincere thanks to Drs A K Mitra, R Bairagi, and K Stewart for reviewing the manuscript.

A more effective physiotherapy intervention is required for stroke patients with persisting mobility problems after stroke.

At final follow-up 2-7 years after their first stroke, 328 survivors from the Oxfordshire Community Stroke Project register were assessed for mobility disability. Patients were classified as being either mobile or immobile, according to defined criteria. Of the 190 immobile patients, only 60 could be entered into a trial of physiotherapy. The major causes of attrition were refusal to participate (97 patients) and the absence of any stroke impairment causing the immobility (18). Arthritis (67) and dementia (39) were common in patients with mobility disability. Immobile patients were older and had suffered a more severe index stroke. This study stresses the relatively low frequency of long-term immobility following stroke directly due to stroke-induced impairments.