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BMC Musculoskeletal Disorders
Published in: BMC Musculoskeletal Disorders 1/2018

Open Access 01-12-2018 | Research article

Validation of the Polish version of the Western Ontario Rotator Cuff Index in patients following arthroscopic rotator cuff repair

Authors: Agnieszka Bejer, Mirosław Probachta, Marek Kulczyk, Sharon Griffin, Elżbieta Domka-Jopek, Jędrzej Płocki

Published in: BMC Musculoskeletal Disorders | Issue 1/2018

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Abstract

Background

The Western Ontario Rotator Cuff Index (WORC) is a joint specific outcome tool that assesses the quality of life in patients with various rotator cuff problems.
Our purpose was to evaluate selected psychometric characteristics (internal consistency, validity, reliability and agreement) of the Polish version of WORC in patients undergoing rotator cuff repair.

Methods

Sixty-nine subjects took part in the study with a mean age 55.5 (range 40–65). All had undergone arthroscopic rotator cuff repair in 2015–2016. Data from 57 patients in whom symptoms in the shoulder joint had not changed within 10–14 days were analyzed in a WORC test-retest using the Intraclass Correlation Coefficient (ICC), Standard Error of Measurement (SEM) and Minimal Detectable Change (MDC). WORC was compared to the short version of the Disabilities of Arm, Shoulder and Hand Questionnaire (QuickDash) and the Short Form-36 v. 2.0 (SF-36).

Results

High internal consistency of 0.94 was found using Cronbach’s alpha coefficient. Reliability of the WORC resulted in ICC = 0.99, agreement assessed with SEM and MDC amounted to 1.62 and 4.48 respectively. The validity analysis of WORC showed strong correlations with QuickDash and SF-36 PCS (Physical Component Summary), while moderate with SF-36 MCS (Mental Component Summary). WORC had no floor or ceiling effect.

Conclusions

The Polish version of the WORC is a reliable and valid tool with high internal consistency for assessing the quality of life in patients undergoing arthroscopic rotator cuff repair.
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Metadata
Title
Validation of the Polish version of the Western Ontario Rotator Cuff Index in patients following arthroscopic rotator cuff repair
Authors
Agnieszka Bejer
Mirosław Probachta
Marek Kulczyk
Sharon Griffin
Elżbieta Domka-Jopek
Jędrzej Płocki
Publication date
01-12-2018
Publisher
BioMed Central
Published in
BMC Musculoskeletal Disorders / Issue 1/2018
Electronic ISSN: 1471-2474
DOI
https://doi.org/10.1186/s12891-018-2238-9

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