Cross-cultural adaptation and validation of the Italian version of the Western Ontario Osteoarthritis of the Shoulder index WOOSReport as inadecuate

Cross-cultural adaptation and validation of the Italian version of the Western Ontario Osteoarthritis of the Shoulder index WOOS - Download this document for free, or read online. Document in PDF available to download.

Journal of Orthopaedics and Traumatology

, Volume 17, Issue 4, pp 309–313

First Online: 31 March 2016Received: 28 September 2015Accepted: 21 February 2016


BackgroundThe 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 methodsThe 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.

ResultsThe 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.

ConclusionsThe 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 evidenceLevel II.

KeywordsShoulder osteoarthritis Western Ontario Osteoarthritis of the Shoulder index Cross-cultural adaptation Validation Electronic supplementary materialThe online version of this article doi:10.1007-s10195-016-0400-4 contains supplementary material, which is available to authorized users.

Download fulltext PDF

Author: Katia Corona - Simone Cerciello - Brent Joseph Morris - Enrico Visonà - Giovanni Merolla - Giuseppe Porcellini


Related documents