Original articleInterpretation of change scores in ordinal clinical scales and health status measures: The whole may not equal the sum of the parts☆
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Supported by NIH Grant AR 36308. Dr. Stucki is a recipient of a fellowship of the Swiss National Science Foundation and grants from the European League against Rheumatism and the Swiss Associations of Physical Medicine, Rehabilitation and Rheumatology.
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Dr. Katz is supported in part by an Arthritis Investigator Award from the Arthritis Foundation.
Copyright © 1996 Published by Elsevier Inc.