Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12161
Title: Rasch analysis for outcomes measures : some methodological considerations
Authors: Chang, WC
Chan, C 
Issue Date: 1995
Publisher: W.B. Saunders
Source: Archives of physical medicine and rehabilitation, 1995, v. 76, no. 10, p. 934-939 How to cite?
Journal: Archives of physical medicine and rehabilitation 
Abstract: Objective: To assess the four approaches to applying Rasch analysis to ordinal, repeated measures: (1) to perform separate Rasch analyses; (2) to perform a single analysis by treating the subjects measured on different occasions as distinct ones; (3) to perform a single analysis by treating items used on different occasions as distinct ones; and (4) to construct a 3-facet model by adding occasions as the third facet. Design: Various Rasch and 3-facet models applied to retrospective, cohort data. Setting: A stroke program at a rehabilitation hospital. Patients: 99 of the 107 consecutive patients admitted between March and October, 1990, average age 69 years, 40% of whom were women, with an average stay of 54 days. Intervention: Medical inpatient rehabilitation. Main Outcome Measure: The Functional Independence Measure (FIM), administered within 1 week of admission and discharge, and approximately 6 weeks after discharge. Results: The four approaches resulted in various occasion-specific and generalized measures of item difficulty, patient ability, and occasion severity. Although these measures turned out to be congruent with each other as they should, they generated different sources of information needed for formative and summative evaluation of health care outcomes. All four approaches were found to be useful, although each had its own limitations. A four-step strategy based on these approaches was therefore designed and recommended. Conclusion: Rasch analysis of ordinal, repeated measures poses a special challenge to those interested in health care outcomes. A multi-method strategy incorporating various approaches is therefore needed to optimize its use in health care research.
URI: http://hdl.handle.net/10397/12161
ISSN: 0003-9993
EISSN: 1532-821X
DOI: 10.1016/S0003-9993(95)80070-0
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

50
Last Week
0
Last month
0
Citations as of Aug 12, 2017

WEB OF SCIENCETM
Citations

43
Last Week
0
Last month
0
Citations as of Aug 12, 2017

Page view(s)

47
Last Week
3
Last month
Checked on Aug 13, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.