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Physiotherapy Theory and Practice
An International Journal of Physical Therapy
Volume 37, 2021 - Issue 6
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Descriptive Report

Reliability and validity of the timed 360° turn test in people with multiple sclerosis

, PT, MScORCID Icon, , PT, PhDORCID Icon, , PT, PhDORCID Icon, , PT, MScORCID Icon, , MDORCID Icon & , MDORCID Icon
Pages 736-747 | Received 23 Nov 2018, Accepted 06 Jun 2019, Published online: 18 Jul 2019
 

ABSTRACT

Objectives: To investigate (1) the intrarater, interrater, and test–retest reliability of the timed 360° turn test in people with Multiple Sclerosis (MS); (2) the minimum detectable change in the timed 360° turn test times; (3) the concurrent and discriminant validity of the timed 360° turn test times; and (4) the cut-off times that best discriminate people with MS from healthy people and fallers from non-fallers with MS.

Method: Sixty-one people with MS (Expanded Disability Status Scale, EDSS, 0–6.5) and 34 healthy people were recruited in this cross-sectional study. The timed 360° turn test was administered along with the Timed Up and Go Test, Berg Balance Scale, Four Square Step Test, and EDSS by two independent raters.

Results: The timed 360° turn test showed good intrarater, interrater, and test–retest reliability. Minimal detectable changes were 1.49 s and 1.53 s for the dominant and non-dominant sides, respectively. The timed 360° turn test was strongly correlated with other outcome measures. Significant differences in 360° turn times were found between people with MS and healthy people and between fallers and non-fallers with MS (p < .001 and p < .001, respectively). The cut-off times of 2.65 s on the dominant side and 2.42 s on the non-dominant best discriminated people with MS from healthy people, while 3.65 s on the dominant side and 3.75 s on the non-dominant best discriminated fallers from non-fallers with MS.

Conclusions: The timed 360° turn test is a simple and reliable tool for assessing turning ability in MS.

Acknowledgments

We thank the individuals who participated in this study.

Declaration of Interest

The authors report no conflict of interest.

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