Item hierarchy-based analysis of the Rivermead Mobility Index resulted in improved interpretation and enabled faster scoring in patients undergoing rehabilitation after stroke
Publication date
2012Keyword
Activities of daily livingAge factors
Aged
Aged, 80 and over
Cohort studies
Disability evaluation
Female
Humans
Male
Middle aged
Mobility limitation
Netherlands
Outcome assessment (health care)
Prognosis
Psychometrics
Recovery of function
Rehabilitation centers
Risk assessment
Severity of illness index
Sex factors
Socioeconomic factors
Stroke
Task performance and analysis
Time factors
REF 2014
Metadata
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OBJECTIVE: To enable improved interpretation of the total score and faster scoring of the Rivermead Mobility Index (RMI) by studying item ordering or hierarchy and formulating start-and-stop rules in patients after stroke. DESIGN: Cohort study. SETTING: Rehabilitation center in the Netherlands; stroke rehabilitation units and the community in the United Kingdom. PARTICIPANTS: Item hierarchy of the RMI was studied in an initial group of patients (n=620; mean age +/- SD, 69.2+/-12.5y; 297 [48%] men; 304 [49%] left hemisphere lesion, and 269 [43%] right hemisphere lesion), and the adequacy of the item hierarchy-based start-and-stop rules was checked in a second group of patients (n=237; mean age +/- SD, 60.0+/-11.3y; 139 [59%] men; 103 [44%] left hemisphere lesion, and 93 [39%] right hemisphere lesion) undergoing rehabilitation after stroke. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Mokken scale analysis was used to investigate the fit of the double monotonicity model, indicating hierarchical item ordering. The percentages of patients with a difference between the RMI total score and the scores based on the start-and-stop rules were calculated to check the adequacy of these rules. RESULTS: The RMI had good fit of the double monotonicity model (coefficient H(T)=.87). The interpretation of the total score improved. Item hierarchy-based start-and-stop rules were formulated. The percentages of patients with a difference between the RMI total score and the score based on the recommended start-and-stop rules were 3% and 5%, respectively. Ten of the original 15 items had to be scored after applying the start-and-stop rules. CONCLUSIONS: Item hierarchy was established, enabling improved interpretation and faster scoring of the RMI.Citation
Roorda, L. D., Green, J. R., Houwink, A., Bagley, P. J., Smith, J., Molenaar, I. W., Geurts, A. C. (2012) Item hierarchy-based analysis of the Rivermead Mobility Index resulted in improved interpretation and enabled faster scoring in patients undergoing rehabilitation after stroke. Archives of Physical Medicine and Rehabilitation, 93 (6), 1091-1096.Link to Version of Record
https://doi.org/10.1016/j.apmr.2011.12.021Type
Articleae974a485f413a2113503eed53cd6c53
https://doi.org/10.1016/j.apmr.2011.12.021