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Medicina is published by MDPI from Volume 54 Issue 1 (2018). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on mdpi.com as a courtesy and upon agreement with Lithuanian Medical Association, Lithuanian University of Health Sciences, and Vilnius University.
Open AccessArticle

Cross-cultural adaptation and validation of Lithuanian questionnaires for the spondyloarthropathies

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Clinic of Internal Diseases, Family Medicine, Gerontology and Oncology
2
Clinic of Rheumatology, Traumatology, Orthopedics and Plastic and Reconstructive Surgery
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Institute of Experimental and Clinical Medicine, Vilnius University, Lithuania
*
Author to whom correspondence should be addressed.
Medicina 2009, 45(3), 177; https://doi.org/10.3390/medicina45030023
Received: 6 November 2008 / Accepted: 6 March 2009 / Published: 11 March 2009
Original English questionnaires – Bath Ankylosing Spondylitis Functional Index, Bath Ankylosing Spondylitis Patient Global Score, and Bath Ankylosing Spondylitis Disease Activity Index – are designed to evaluate health, physical and psychical state of patients with spondyloarthropathies and to assess efficiency of the treatment.
Objective
. The objective of the study was to adapt Bath Ankylosing Spondylitis Functional Index, Bath Ankylosing Spondylitis Patient Global Score, Bath Ankylosing Spondylitis Disease Activity Index questionnaires to the Lithuanian context and examine their psychometric aspects: reliability and validity.
Patients and methods
. Validation and linguistic and cultural adaptation of Lithuanian questionnaires were performed according to the requirements for adaptation of the international questionnaires. Psychometric features of Lithuanian questionnaires were examined in 139 patients with spondyloarthropathies. The validity of questionnaires was tested by comparing these questionnaires with Health Assessment Questionnaire Modified for Spondyloarthropathies, metrology indices (tragus-to-wall distance, lateral flexion, modified Schober’s distance, intermalleolar distance), pain intensity, patient’s well-being, physician’s assessment of the disease activity, and total enthesis count. The reliability of questionnaires was assessed by determining internal consistency of scales and scale stability and by calculating the intraclass correlation coefficient.
Results
. The linguistic and cultural adaptation of these questionnaires was made during the study. Internal consistency was high for functional and disease activity index (Cronbach a³0.80) and moderate for the Bath Ankylosing Spondylitis Patient Global Score (Cronbach a=0.58). High stability in regard to time was characteristic of all three questionnaires (intraclass correlation coefficient >0.95). A significant association between the separate questions of examined instruments, their joint results and other factors reflecting patient’s health was established.
Conclusions.
Bath Ankylosing Spondylitis Functional Index, Bath Ankylosing Spondylitis Patient Global Score, and Bath Ankylosing Spondylitis Disease Activity Index questionnaires in Lithuanian fully correspond to psychometric requirements. They are appropriate and relevant in assessing the influence of spondyloarthropathies on a patient’s health.
Keywords: Bath Ankylosing Spondylitis Functional Index; Bath Ankylosing Spondylitis Patient Global Score; Bath Ankylosing Spondylitis Disease Activity Index; cross-cultural adaptation; reliability; validity Bath Ankylosing Spondylitis Functional Index; Bath Ankylosing Spondylitis Patient Global Score; Bath Ankylosing Spondylitis Disease Activity Index; cross-cultural adaptation; reliability; validity
MDPI and ACS Style

Vencevičienė, L.; Rugienė, R.; Venalis, A.; Butrimienė, I. Cross-cultural adaptation and validation of Lithuanian questionnaires for the spondyloarthropathies. Medicina 2009, 45, 177.

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