Article

Objective : To achieve optimal
clinimetric properties for outcome measures, both practical and psychometric,
ongoing improvements are required. PURPOSE : To evaluate if the Upper
Limb Functional Index (ULFI) clinimetric properties are improved by modification
to a three-point response option and to verify the factor structure. METHODS: Stage 1, calibration (n=139) used ULFI dichotomous responses, and stage 2,
validation (n=117) used a three-point response option. The clinimetric properties
were compared in physical therapy outpatients with the QuickDASH as the reference
standard. Repeated measurements were made at two to four weekly intervals.
RESULTS: The ULFI three-point response option improved reliability [intraclass
correlation coefficient (2,1)=0.98], internal consistency (alpha=0.92), QuickDASH
concurrent validity (r=0.86),
and responsiveness. Minimal detectable change (90%
confidence interval) was 7.9%, and factor structure was unidimensional. Missing
responses were <0.5%, and practical characteristics were unchanged. CONCLUSIONS:
The enhanced reliability and reduced errors with unchanged practicality
demonstrate the ULFI improvements through modification to a three-point response
option. LEVEL OF EVIDENCE: 2c.
CI - Crown Copyright (c) 2010. Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS