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J Arthroplasty. 2014 Jun;29(6):1169-1175.e2. doi: 10.1016/j.arth.2014.01.016. Epub 2014 Jan 21.

A reliable, valid and responsive questionnaire to score the impact of knee complaints on work following total knee arthroplasty: the WORQ.

Author information

1
Department of Orthopedics, Orthopaedic Research Center Amsterdam, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands; Department of Surgery, Onze Lieve Vrouwe Gasthuis, Amsterdam, The Netherlands.
2
Coronel Institute of Occupational Health, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
3
Department of Psychological Methods, University of Amsterdam, Amsterdam, The Netherlands.
4
Department of Orthopedics, Slotervaart Hospital, Amsterdam, The Netherlands.
5
Department of Orthopedics, Orthopaedic Research Center Amsterdam, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.

Abstract

The Work, Osteoarthritis or joint-Replacement Questionnaire (WORQ) was developed to assess physical difficulty experienced in work before or following total knee arthroplasty (TKA). Thirteen questions were designed. The WORQ was tested for internal consistency by factor analysis, internal reliability (Crohnbach's α), and construct validity. A test-retest reproducibility was performed for analyzing standard error of measurement (SEM agreement), reliability (ICC) and smallest detectable change (SDC) in individuals and groups. Lastly responsiveness (standardized response means [SRM]), floor and ceiling effects and interpretability (minimal important change [MIC]) were analyzed. It is shown that the WORQ is a reliable, valid and responsive questionnaire that can be used to evaluate the impact of knee complaints following TKA on patients' ability to work.

KEYWORDS:

WORQ; clinimetrics; factor analysis; osteoarthritis; patient-reported outcome measures (PROMs); total knee arthroplasty (TKA); work ability

PMID:
24581898
DOI:
10.1016/j.arth.2014.01.016
[Indexed for MEDLINE]
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