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Rasch analysis of the Rivermead Mobility Index : A study using mobility measures of first-stroke inpatients
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ANTONUCCI G; APRILE T; PAOLUCCI S
ARCH PHYS MED REHABIL , 2002, vol. 83, n° 10, p. 1442-1449 Doc n°: 107022 Localisation : Documentation IRR Descripteurs : AF21 - ACCIDENTS VASCULAIRES CEREBRAUX Url : http://www.archives-pmr.org/issues
Article consultable sur : http://www.archives-pmr.org
Objective: To evaluate the validity and item unidimensionality of the Rivermead Mobility Index (RMI) by using Rasch analysis. Design: Application of Rasch analysis on the RMI partial data set. Setting: A stroke program at a rehabilitation hospital in Italy. Participants: A total of 308 consecutive patients (155 women, 153 men; avg age, 62.79+/-11.94y) hospitalized between 1990 and 1996. Average interval between stroke onset and admission was 52.48+/-36.22 days. Intervention: Medical inpatient rehabilitation. Main Outcome Measures: Patients' mobility status was assessed using the RMI administered at admission and discharge. Ratings were assigned by 4 staff members working as a team. We performed separate Rasch analyses on the RMI data, gathered from different groups of first stroke inpatients examined before and after rehabilitation treatment. Results: Rasch analysis showed the overall good validity of the RMI, except for item 15, which did not fit the unidimensional continuum estimated through the Rasch rating model. Conclusion: The RMI is a unidimensional scale with a hierarchy of easy-to-hard test questions. Item difficulty level was stable when processed on different groups of patients assessed on different occasions. Langue : ANGLAIS Identifiant basis : 2003225103 |
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