Evaluating the reliability and validity of the Icelandic translation of the Mini-BESTest in rehabilitation patients: an international implication for balance assessment

Sif Gylfadottir; Solveig A Arnadottir; Selma Margret Reynisdottir; Bjartey Helgadottir; Andri Thor Sigurgeirsson; Marta Gudjonsdottir

doi:10.1080/09593985.2023.2286635

Evaluating the reliability and validity of the Icelandic translation of the Mini-BESTest in rehabilitation patients: an international implication for balance assessment

Physiother Theory Pract. 2023 Dec 4:1-10. doi: 10.1080/09593985.2023.2286635. Online ahead of print.

Authors

Sif Gylfadottir¹, Solveig A Arnadottir², Selma Margret Reynisdottir², Bjartey Helgadottir², Andri Thor Sigurgeirsson¹, Marta Gudjonsdottir^{1

3}

Affiliations

¹ Department of Physical Therapy, Reykjalundur Rehabilitation Center, Mosfellsbaer, Iceland.
² Department of Physical Therapy, Faculty of Medicine, University of Iceland, Reykjavik, Iceland.
³ Department of Physiology, Faculty of Medicine, University of Iceland, Reykjavik, Iceland.

PMID: 38044618
DOI: 10.1080/09593985.2023.2286635

Abstract

Background: The Mini-BESTest (Balance Evaluation Systems Test) is a standardized balance evaluation tool. The psychometric properties of the Mini-BESTest are being established around the world.

Purpose: This study aimed to evaluate the reliability and validity of the Icelandic translation of the Mini-BESTest.

Methods: Thirty rehabilitation inpatients (16/14 women/men), with mixed diagnoses and a range of self-assessed balance, were assessed with the: Mini-BESTest on two occasions; Activities-specific Balance Confidence Scale; Berg Balance Scale; Timed Up and Go test; and 10 Meter Walk Test. Statistical analyses included the Intraclass Correlation Coefficient (ICC), standard error of measurement (SEM), Cronbach's alpha (α), Pearson's r, and the independent t-test.

Results: Relative reliability demonstrated good test-retest (ICC_3.1 = 0.84), intra-rater reliability (ICC_3.1 = 0.86), and excellent inter-rater reliability (ICC_2.1 = 0.96). Absolute reliability (SEM) was 1.607, and internal consistency (α) was 0.80. Construct validity was supported by a high correlation between the Mini-BESTest and other standardized measures (r = ±0.6-0.73). The Mini-BESTest discriminated between patients with poor versus good self-rated balance (p ˂ 0.001), with no floor or ceiling effects.

Conclusion: The psychometric properties of the Icelandic translation of the Mini-BESTest are comparable with the original version and other translations. These results for this mixed patient group should be relevant to clinicians and researchers internationally.

Keywords: Postural balance; health care; outcome assessment; psychometrics; rehabilitation; translation.