Is stair climb power a clinically relevant measure of leg power impairments in at-risk older adults?
Is stair climb power a clinically relevant measure of leg power impairments in at-risk older adults?
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DOI：
10.1016/j.apmr.2007.02.004
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发表时间：
2007-05-01
影响因子：
4.3
通讯作者：
Frontera, Walter R.
中科院分区：
文献类型：
--
作者：
Bean, Jonathan F.;Kiely, Dan K.;Frontera, Walter R.
目的：测试爬楼梯功率测试（SCPT）作为老年人活动障碍中腿部功率损伤的测量的临床相关性。设计：随机对照试验中参与者基线数据的横断面分析。设置：康复研究健身房。参与者：社区居住的老年人（N=138;平均年龄，75.4岁），根据短体力活动成套测验（SPPB）的定义，存在活动受限。干预措施：不适用。主要结果测量：腿部力量测量包括在1次重复最大值的40%（DLP 40）和70%（DLP 70）下测量的SCPT和双腿推举力量。结果：每公斤爬楼梯功率（SCP/kg）与DLP 40/kg和DLP 70/kg分别呈中度、强度相关（r=.47，r=.52）。除DLP 40/kg外，所有3个腿部力量测量值均与每个移动性能测量值相关（r=. 11，P=.27）和DLP 70/kg（r=. 11，P=.18）。皮尔逊相关系数所描述的关联程度在单独的功率测量中没有实质性差异，因为它们与SPPB整体性能相关。评价腿部力量和SPPB性能之间关系的单独调整多变量模型均具有统计学显著性，并描述了SPPB性能的总方差（R-2）的等效量（SCP/kg，R-2=30; DLP 40，R-2=32; DLP 70，R-2 =.31）。对SPPB的组成部分的分析表明，SCPT与预测椅子站立的模型之间的关联性比其他腿部力量障碍指标更强（SCP/kg，R-2 = 0.25; 2 = 2 = DLP 40，R.12; DLP 70，R.13），而两种类型的腿部压力测试与模型2 = 2 =预测2步态速度具有更强的相关性（SCP/kg，R.16; DLP40，R.34; DLP70，R =34）。爬楼梯功率是唯一的功率措施，是一个重要组成部分的模型预测站立平衡（SCP/kg R-2 =.20）。结论：SCPT是一个临床相关的措施，腿部力量障碍。它与更复杂的腿部力量障碍测试模式相关，并与移动性能有意义地相关，使其适用于感兴趣的障碍-移动关系的临床环境。
Objective: To test the clinical relevance of the stair climb power test (SCPT) as a measure of leg power impairments in mobility-impairments in older adults.Design: Cross-sectional analysis of baseline data from participants within a randomized controlled trial.Setting: Rehabilitation research gym.Participants: Community-dwelling older adults (N=138; mean age, 75.4y) with mobility limitations as defined by the Short Physical Performance Battery (SPPB).Interventions: Not applicable.Main Outcome Measures: Leg power measures included the SCPT and double leg press power measured at 40% (DLP40) and 70% (DLP70) of the 1 repetition maximum. Mobility performance tests included the SPPB and its 3 components: gait speed, chair stand time, and standing balance.Results: Stair climb power per kilogram (SCP/kg) had correlations of moderate, strength (r=.47, r=.52) with DLP40/kg and DLP70/kg, respectively. All 3 leg power measures correlated with each of the mobility performance measures with the exception of DLP40/kg (r=. 11, P=.27) and DLP70/kg (r=. 11, P=.18) with standing balance. Magnitudes of association, as described by the Pearson correlation coefficient, did not differ substantively among the separate power measures as they related to SPPB performance overall. Separate adjusted multivariate models evaluating the relationship between leg power and SPPB performance were all statistically significant and described equivalent amounts of the total variance (R-2) in SPPB perforlinance (SCP/kg, R-2=30; DLP40, R-2=32; DLP70, R-2 =.31). Analyses of the components of the SPPB show that the SCPT had stronger associations than the other leg power impairment measures with models predicting chair stand (SCP/kg, R-2 =.25; 2 = 2 = DLP40, R.12; DLP70, R.13), whereas both types of leg press power testing had stronger associations with models 2 = 2 = predicting 2 gait speed (SCP/kg, R.16; DLP40, R.34; DLP70, R =34). Stair climb power was the only power measure that was a significant component of models predicting standing balance (SCP/kg R-2 =.20).Conclusions: The SCPT is a clinically relevant measure of leg power impairments. It is associated with more complex modes of testing leg power impairments and is meaningfully associated with mobility performance, making it suitable for clinical settings in which impairment-mobility relationships are of interest.