Williams Richelle M, Corvo Matthew A, Lam Kenneth C, Williams Travis A, Gilmer Lesley K, McLeod Tamara C Valovich
Research Support, A.T Still University, Mesa AZ.
Seattle Mariners, Minor league affiliation, Peoria, AZ.
J Sport Rehabil. 2017 May 1;26(3). doi: 10.1123/jsr.2016-0163. Epub 2017 Jan 17.
Postural control plays an essential role in concussion evaluation. The Stability Evaluation Test (SET) aims to objectively analyze postural control by measuring sway velocity on the NeuroCom VSR portable force platform (Natus, San Carlos, CA).
To assess the test-retest reliability and practice effects of the SET protocol.
Cohort.
Research laboratory.
50 healthy adults (20 men, 30 women, age 25.30 ± 3.60 y, height 166.60± 12.80 cm, mass 68.80 ± 13.90 kg).
All participants completed 4 trials of the SET. Each trial consisted of six 20-s balance tests with eyes closed, under the following conditions: double-leg firm (DFi), single-leg firm (SFi), tandem firm (TFi), double-leg foam (DFo), single-leg foam (SFo), and tandem foam (TFo). Each trial was separated by a 5-min seated rest period.
The dependent variable was sway velocity (deg/s), with lower values indicating better balance. Sway velocity was recorded for each of the 6 conditions as well as a composite score for each trial. Test-retest reliability was analyzed across 4 trials with intraclass correlation coefficients (ICCs). Practice effects analyzed with repeated measures analysis of variance, followed by Tukey post hoc comparisons for any significant main effects (P < .05).
Sway-velocity reliability values were good to excellent: DFi (ICC = .88; 95%CI: .81, .92), SFi (ICC = .75; 95%CI: .61, .85), TFi (ICC = .84; 95%CI: .75, .90), DFo (ICC = .83; 95%CI: .74, .90), SFo (ICC = .82; 95%CI: .72, .89), TFo (ICC = .81; 95%CI: .69, .88), and composite score (ICC = .93; 95%CI: .88, .95). Significant practice effects (P < .05) were noted on the SFi, DFo, SFo, TFo conditions and composite scores.
Our results suggest the SET has good to excellent reliability for the assessment of postural control in healthy adults. Due to the practice effects noted, a familiarization session is recommended (ie, all 6 conditions) before data are recorded. Future studies should evaluate injured patients to determine meaningful change scores during various injuries.
姿势控制在脑震荡评估中起着至关重要的作用。稳定性评估测试（SET）旨在通过在NeuroCom VSR便携式测力平台（Natus，加利福尼亚州圣卡洛斯）上测量摇摆速度来客观分析姿势控制。
评估SET方案的重测信度和练习效应。
队列研究。
研究实验室。
50名健康成年人（20名男性，30名女性，年龄25.30±3.60岁，身高166.60±12.80厘米，体重68.80±13.90千克）。
所有参与者完成4次SET测试。每次测试包括6次20秒的闭眼平衡测试，测试条件如下：双腿站立在坚实地面（DFi）、单腿站立在坚实地面（SFi）、前后站立在坚实地面（TFi）、双腿站立在泡沫垫上（DFo）、单腿站立在泡沫垫上（SFo）以及前后站立在泡沫垫上（TFo）。每次测试之间有5分钟的坐姿休息时间。
因变量为摇摆速度（度/秒），数值越低表明平衡能力越好。记录每种6种条件下的摇摆速度以及每次测试的综合得分。使用组内相关系数（ICC）分析4次测试间的重测信度。采用重复测量方差分析来分析练习效应，随后对任何显著的主效应进行Tukey事后比较（P<.05）。
摇摆速度的信度值良好至优秀：DFi（ICC=.88；95%CI：.81，.92）、SFi（ICC=.75；95%CI：.61，.85）、TFi（ICC=.84；95%CI：.75，.90）、DFo（ICC=.83；95%CI：.74，.90）、SFo（ICC=.82；95%CI：.72，.89）、TFo（ICC=.81；95%CI：.69，.88）以及综合得分（ICC=.93；95%CI：.88，.95）。在SFi、DFo、SFo、TFo条件和综合得分上观察到显著的练习效应（P<.05）。
我们的结果表明，SET在评估健康成年人的姿势控制方面具有良好至优秀的信度。由于存在练习效应，建议在记录数据之前进行一次熟悉测试环节（即所有6种条件）。未来的研究应评估受伤患者，以确定在各种损伤期间有意义的变化分数。
