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Journal of Orthopaedics and Traumatology

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Open Access 01-12-2016 | Original Article

Cross-cultural adaptation and validation of the Italian version of the Western Ontario Osteoarthritis of the Shoulder index (WOOS)

Authors: Katia Corona, Simone Cerciello, Brent Joseph Morris, Enrico Visonà, Giovanni Merolla, Giuseppe Porcellini

Published in: Journal of Orthopaedics and Traumatology | Issue 4/2016

Abstract

Background

The Western Ontario Osteoarthritis of the Shoulder index (WOOS) has been introduced as a disease-specific quality of life measurement in patients with glenohumeral arthritis. The aim of the present study was to perform a cross-cultural adaptation of the English version of the WOOS to Italian and to assess its validity, reliability and responsiveness in patients with glenohumeral joint osteoarthritis treated conservatively.

Material and methods

The adaptation process was carried out following the simplified Guillemin criteria. The English version was translated into Italian by two bilingual orthopaedic surgeons and then translated back into English by two different bilingual orthopaedic surgeons. The original version was compared with the back-translation. The questionnaire was prospectively administered to 30 patients with glenohumeral osteoarthritis at baseline and again after 5 days for retest reliability. After 6 months of conservative treatment, the responsiveness of the questionnaire was assessed in a subsample of 20 patients. The level of statistical significance was set at 0.05.

Results

The interclass correlation coefficient between test and retest of the WOOS was 0.99 (P < 0.001). Pearson’s correlation coefficient between the WOOS and disability of the arm, shoulder and hand (DASH) preoperatively was 0.73 (P < 0.01) and the correlation between the changes of score for the WOOS and DASH was 0.75 (P < 0.01). There were no floor or ceiling effects. Responsiveness, calculated by standardized response mean, was 1.1 and effect size was 1.3.

Conclusions

The Italian version of the WOOS questionnaire has shown to be equivalent to its English version and demonstrated good validity, reliability and responsiveness to conservative treatment of glenohumeral osteoarthritis.

Level of evidence

Level II.

Available only for authorised users

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Title: Cross-cultural adaptation and validation of the Italian version of the Western Ontario Osteoarthritis of the Shoulder index (WOOS)
Authors: Katia Corona
Simone Cerciello
Brent Joseph Morris
Enrico Visonà
Giovanni Merolla
Giuseppe Porcellini
Publication date: 01-12-2016
Publisher: Springer International Publishing
Published in: Journal of Orthopaedics and Traumatology / Issue 4/2016
Print ISSN: 1590-9921
Electronic ISSN: 1590-9999
DOI: https://doi.org/10.1007/s10195-016-0400-4

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Cross-cultural adaptation and validation of the Italian version of the Western Ontario Osteoarthritis of the Shoulder index (WOOS)

Abstract

Background

Material and methods

Results

Conclusions

Level of evidence

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Abstract

Background

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