The intra-rater reliability and agreement of compensatory stepping thresholds of healthy subjects.
The intra-rater reliability and agreement of compensatory stepping thresholds of healthy subjects.
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DOI：
10.1016/j.gaitpost.2013.11.006
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发表时间：
2014-02
期刊：
影响因子：
2.4
通讯作者：
Kaufman, Kenton R.
中科院分区：
文献类型：
--
作者：
Crenshaw, Jeremy R.;Kaufman, Kenton R.
本研究的目的是评估重测、评分内信度和代偿步阈值的一致性。制定了一种方案来建立正反单步阈值、正反多步阈值和横向单步阈值。健康的年轻受试者站在微处理器控制的跑步机上，对三组逐渐具有挑战性的表面翻译做出反应。当设定单步阈值时，受试者被要求“尽量不迈步”；当设定多步阈值时，受试者被要求“尽量只迈步”。步进阈值被定义为持续引起单个或第二个补偿步骤的最小干扰幅度。阈值表示为保持直立姿势所需的踝关节扭矩。研究的阈值包括前单步阈值（τ= 273.0±82.3 N m）、后单步阈值（τ= 235.5±98.0 N m）、前多步阈值（τ= 977.0±416.3 N m）、后多步阈值（τ= 701.9±237.5 N m）、稳定性侧侧单步阈值（τ= 225.7±77.7 N m）和移动性侧侧单步阈值（τ= 236.8±85.4 N m）。基于类内相关系数（ICC）和Bland-Altman图，所有阈值都具有良好的信度（ICC(2,1) = 0.87-0.97）和一致性。这些结果表明，代偿性步进阈值具有足够的可重复性，可用于临床和研究相关的跌倒风险评估。需要进一步的研究来确定对感兴趣的患者群体特定的阈值的内部和内部信度和有效性。
The purpose of this study was to evaluate the test–retest, intra-rater reliability and agreement of compensatory stepping thresholds. A protocol was developed to establish anteroposterior single-stepping thresholds, anteroposterior multiple-stepping thresholds, and lateral single-stepping thresholds. Healthy, young subjects stood on a microprocessor-controlled treadmill, and responded to three series of progressively challenging surface translations. Subjects were instructed to “try not to step” when establishing single-stepping thresholds or “try to take only one step” when establishing multiple-stepping thresholds. Stepping thresholds were defined as the minimum disturbance magnitude that consistently elicited a single or second compensatory step. Thresholds were expressed as the ankle torque necessary to maintain upright posture. Thresholds studied included anterior single-stepping thresholds (τ= 273.0 ± 82.3 N m), posterior single-stepping, thresholds (τ= 235.5 ± 98.0 N m), anterior multiple-stepping thresholds (τ= 977.0 ± 416.3 N m), posterior multiple-stepping thresholds (τ= 701.9 ± 237.5 N m), stability-side lateral single-stepping thresholds (τ= 225.7 ± 77.7 N m), and mobility-side lateral single-stepping thresholds (τ= 236.8 ± 85.4 N m). Based on intraclass correlation coefficients (ICC) and Bland–Altman plots, all thresholds demonstrated excellent reliability (ICC(2,1) = 0.87–0.97) and agreement. These results suggest that compensatory stepping thresholds have sufficient repeatability to be used in clinical and research-related assessments of fall-risk. Additional study is needed to determine the intra- and inter-rater reliabilities and validity of thresholds specific to the patient populations of interest.
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影响因子：
1.8
作者：
Jensen, JL;Brown, LA;Woollacott, MH
通讯作者：
Woollacott, MH
影响因子：
4.7
作者：
Marigold, DS;Eng, JJ;Inglis, JT
通讯作者：
Inglis, JT
DOI：
10.1109/86.662618
发表时间：
1998-03-01
期刊：
IEEE transactions on rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society
影响因子：
--
作者：
Henry, S M;Fung, J;Horak, F B
通讯作者：
Horak, F B
影响因子：
2.4
作者：
Cyr, Marc-Andre;Smeesters, Cecile
通讯作者：
Smeesters, Cecile
DOI：
10.1046/j.1532-5415.2002.50505.x
发表时间：
2002-11-01
影响因子：
6.3
作者：
Hall, CD;Jensen, JL
通讯作者：
Jensen, JL