选择的姿势控制措施在预测慢性踝关节不稳定状态方面的差异能力。
Differential ability of selected postural-control measures in the prediction of chronic ankle instability status.
机构信息
University of Virginia, Charlottesville, VA 22903, USA.
出版信息
J Athl Train. 2011 May-Jun;46(3):257-62. doi: 10.4085/1062-6050-46.3.257.
CONTEXT
Chronic ankle instability (CAl) is a term used to identify a condition associated with recurrent ankle sprains and persistent symptoms. Balance deficits, evaluated using center-of-pressure (COP) force-plate measurements, have been shown to occur in people with CAl.
OBJECTIVE
To determine the differential abilities of selected force-plate postural-control measures to assess CAl.
DESIGN
Case-control study.
SETTING
Laboratory.
PATIENTS OR OTHER PARTICIPANTS
A total of 63 individuals with CAl (30 men, 33 women: age= 22.3± 3.7 years, height= 169.8 ±9.6 cm, mass= 70.7± 14.3 kg) and 46 healthy controls (22 men, 24 women: age= 21.2± 4.1 years, height= 173.3± 9.2 cm, mass =69.2± 13.2 kg) volunteered.
INTERVENTION(S): Participants performed 3 10-second trials of quiet, single-limb stance on a force plate under 2 conditions: eyes open and eyes closed.
MAIN OUTCOME MEASURE(S): Measures of COP area, COP velocity, COP SO, COP range of excursion, percentage of COP range used, time-to-boundary absolute minimum, time-to-boundary mean of the minima, and time-to-boundary SO of the minima were calculated. All measures with the exception of COP area were calculated in both the mediolateral (ML) and anteroposterior directions. For each measure, a receiver operator curve analysis was created, and the corresponding area under the curve was tested. The optimal diagnostic threshold value for each measure was determined, and the corresponding positive and negative likelihood ratios were calculated.
RESULTS
Three eyes-closed, single-limb force-plate measures (COP ML SO, ML percentage of COP range used, and time-to-boundary absolute minimum) predicted CAl status. However, all 3 measures had positive likelihood ratios associated with only small shifts in the probability of a patient with a positive test having CAl and negative likelihood ratios associated with very small shifts in the probability of a patient with a negative test not having CAl.
CONCLUSIONS
No single force-plate measure was very effective in predicting if an individual had CAl or not.
背景
慢性踝关节不稳定（CAI）是一种用于识别与复发性踝关节扭伤和持续症状相关的病症的术语。使用压力中心（COP）测力板测量发现，CAI 患者存在平衡缺陷。
目的
确定选定测力板姿势控制测量的差异能力，以评估 CAI。
设计
病例对照研究。
设置
实验室。
患者或其他参与者
共有 63 名 CAI 患者（30 名男性，33 名女性；年龄=22.3±3.7 岁，身高=169.8±9.6cm，体重=70.7±14.3kg）和 46 名健康对照者（22 名男性，24 名女性；年龄=21.2±4.1 岁，身高=173.3±9.2cm，体重=69.2±13.2kg）自愿参加。
干预措施
参与者在测力板上进行了 3 次 10 秒的单腿闭眼和睁眼的安静单腿站立试验。
主要观察指标
计算 COP 面积、COP 速度、COP SO、COP 范围、COP 范围使用百分比、边界绝对最小时间、边界最小时间平均值和边界最小时间 SO。除 COP 面积外，所有指标均在横向前后方向（ML）和前后方向计算。对于每个指标，创建一个接收器操作曲线分析，并测试相应的曲线下面积。确定每个指标的最佳诊断阈值值，并计算相应的阳性和阴性似然比。
结果
三个闭眼单腿测力板指标（COP ML SO、ML COP 范围使用百分比和边界绝对最小时间）预测 CAI 状态。然而，所有三个指标的阳性似然比仅与患者阳性测试 CAI 的概率略有变化相关，而阴性似然比与患者阴性测试未患 CAI 的概率的微小变化相关。
结论
没有单个测力板指标对预测个体是否患有 CAI 非常有效。
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