Almeida Gustavo J, Wert David M, Brower Kelly S, Piva Sara R
Department of Physical Therapy, University of Pittsburgh, Pittsburgh, PA.
Department of Physical Therapy, University of Pittsburgh, Pittsburgh, PA.
Arch Phys Med Rehabil. 2015 Mar;96(3):524-31. doi: 10.1016/j.apmr.2014.10.009. Epub 2014 Oct 31.
To determine the concurrent criterion-related validity of 2 activity monitors in comparison with the criterion method of indirect calorimetry in older adults after total knee arthroplasty (TKA).
Validation study.
Subjects completed 9 increasingly demanding daily activities in a research laboratory; each activity was performed for 7 minutes, for a total of 80 minutes, while the activity monitors and criterion method were used concurrently.
Subjects (N=21, 67% women) had a mean age ± SD of 68±7 years and a body mass index of 29±4.
Not applicable.
Energy expenditure (in kcal/min) measured by accelerometer-based and multisensor-based monitors and by a criterion method. Validity was assessed by the paired t test, intraclass correlation coefficient (ICC), and Bland-Altman plots comparing the measurements from the activity monitors with those of the criterion method.
Measurements from the accelerometer-based monitor were significantly lower than those of the criterion method across all walking and nonwalking activities. The underestimations ranged from 40% to 100%. The accelerometer-based monitor demonstrated small to moderate agreement compared with the criterion method (ICCs from 0 to .38). Measurements from the multisensor-based monitor were significantly lower than those of the criterion method during several nonwalking activities; yet, the differences were minor (2%-19%). Measurements from the multisensor-based monitor during walking activities were not different compared with the criterion method. The multisensor-based monitor demonstrated moderate to excellent agreement with the criterion method (ICCs from .48 to .81).
The multisensor-based monitor showed better criterion-related validity than the accelerometer-based monitor and should be considered as a tool to measure physical activity in individuals after TKA.
确定与间接量热法这一标准方法相比，两种活动监测仪在全膝关节置换术（TKA）后老年人中的同时效度。
效度研究。
受试者在研究实验室完成9项要求逐渐提高的日常活动；每项活动进行7分钟，共80分钟，同时使用活动监测仪和标准方法。
受试者（N = 21，67%为女性）平均年龄±标准差为68±7岁，体重指数为29±4。
不适用。
基于加速度计和多传感器的监测仪以及标准方法测量的能量消耗（千卡/分钟）。通过配对t检验、组内相关系数（ICC）以及比较活动监测仪测量值与标准方法测量值的布兰德-奥特曼图评估效度。
在所有步行和非步行活动中，基于加速度计的监测仪测量值均显著低于标准方法测量值。低估范围为40%至100%。与标准方法相比，基于加速度计的监测仪显示出小到中等程度的一致性（ICC为0至0.38）。在几项非步行活动中，基于多传感器的监测仪测量值显著低于标准方法测量值；然而，差异较小（2%至19%）。在步行活动中，基于多传感器的监测仪测量值与标准方法测量值无差异。与标准方法相比，基于多传感器的监测仪显示出中等至极好的一致性（ICC为0.48至0.81）。
与基于加速度计监测仪相比，基于多传感器的监测仪显示出更好的标准效度，应被视为测量TKA术后个体身体活动的工具。
