Test-retest reliability of subjective visual vertical from different head-tilt angles in young healthy adults
Objective:To establish the normal values of subjective visual vertical(SVV)in different head deflection angles and analyze its test and retest reliability,in order to provide a reference for the clinical application of SVV in the evaluation of vestibular disorders.Methods:Thirty-one healthy young people were selected to wear VR glas-ses,and the SVV data were tested in five different head-tilt,namely,0° in the upright head position,45°in the left head position,45° in the right head position,90° in the left head position,and 90° in the right head position,and were re-tested 2 weeks later.Results:①The mean values of SVV at 5 different head-tilt angles of 0°,left 45°,right 45°,left 90°,and right 90° were-0.07±1.71,4.30±5.39,-6.51±5.58,-3.76±7.42,and 0.40±8.02,respectively,The 95％confidence limits of SVV at 0°,left 45°,right 45°,left 90°,right 90°,and right 90° were(-3.42,3.28),(-6.26,14.86),(-17.45,4.43),(-18.30,10.78),and(-15.32,16.12),respec-tively;②The absolute values of SVV at 4 different head-tilt angles of left 45°,right 45°,left 90°,and right 90° were 5.62±3.96,6.90±5.07,6.82±4.70 and 6.48±4.68,respectively.The 95％confidence limits of SVV at left 45°,right 45°,left 90°,right 90°,and right 90° were(0,12.11),(0,15.21),(0,14.53)and(0,14.16),respec-tively.The asymmetry ratio is 10％for the absolute value of the 45 ° deviation and 3％for the absolute value of the 90°deviation;③Intra-class correlation coefficients(ICC)for 0°,left 45°,right 45°,left 90°,right 90°were 0.757,0.673,0.674,0.815,and 0.856,respectively.Conclusion:SVV has good retest reliability and high sta-bility,and the SVV normal value data of different head deviation angles established in the present study can be used as a reference for the diagnosis and evaluation of vestibular disorders.
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万方数据
