Calibration and Cross-Validation of Accelerometer Cut-Points to Classify Sedentary Time and Physical Activity from Hip and Non-Dominant and Dominant Wrists in Older Adults.
Calibration and Cross-Validation of Accelerometer Cut-Points to Classify Sedentary Time and Physical Activity from Hip and Non-Dominant and Dominant Wrists in Older Adults.
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DOI：
10.3390/s21103326
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发表时间：
2021-05-11
期刊：
影响因子：
--
通讯作者：
Shiroma EJ
中科院分区：
文献类型：
--
作者：
Migueles JH;Cadenas-Sanchez C;Alcantara JMA;Leal-Martín J;Mañas A;Ara I;Glynn NW;Shiroma EJ
加速度计对静坐时间(ST)和中等到剧烈体力活动(MVPA)分类的准确性取决于加速度计的放置、数据处理、活动和样本特性。由于强度随着年龄的不同而不同，这项研究试图确定70岁以上人群不同穿戴地点的强度分界点。59名老年人的数据用于校准，21名独立参与者的数据用于交叉验证。参与者在进行活动时在臀部和手腕上佩戴加速计，并使用便携式热量计测量他们的能量消耗。ST和MVPA分别定义为≤1.5代谢当量(MET)和≥3 MET(1 MET=2.8mL/kg/m in)。受试者操作特征(ROC)分析显示准确度为一般到良好(曲线下面积[AUC]=0.62~0.89)。ST段切点：髋关节7 mg(交叉验证：敏感度=0.88，特异度=0.8)，S 1次/5(交叉验证：敏感度=0.91，特异度=0.96)；非优势腕18 mg(交叉验证：敏感度=0.86，特异度=0.86)；S(交叉验证：敏感度=0.91，特异度=0.92)；优势腕22毫克(交叉验证：敏感度=0.91，特异度=0.92)。髋关节MVPA切点为14 mg(交叉验证：敏感度=0.70，特异度=0.99)和54计数/5 S(交叉验证：敏感度=1.00，特异度=0.96)；非优势腕为60 mg(交叉验证：敏感度=0.83，特异度=0.99)和182count/5 S(交叉验证：敏感度=1.00，特异度=0.89)；优势腕为毫克和268次/5 S(未交叉验证)。这些切入点可以根据臀部和手腕佩戴的加速度计对老年人的ST和MVPA进行分类。
Accelerometers’ accuracy for sedentary time (ST) and moderate-to-vigorous physical activity (MVPA) classification depends on accelerometer placement, data processing, activities, and sample characteristics. As intensities differ by age, this study sought to determine intensity cut-points at various wear locations people more than 70 years old. Data from 59 older adults were used for calibration and from 21 independent participants for cross-validation purposes. Participants wore accelerometers on their hip and wrists while performing activities and having their energy expenditure measured with portable calorimetry. ST and MVPA were defined as ≤1.5 metabolic equivalents (METs) and ≥3 METs (1 MET = 2.8 mL/kg/min), respectively. Receiver operator characteristic (ROC) analyses showed fair-to-good accuracy (area under the curve [AUC] = 0.62–0.89). ST cut-points were 7 mg (cross-validation: sensitivity = 0.88, specificity = 0.80) and 1 count/5 s (cross-validation: sensitivity = 0.91, specificity = 0.96) for the hip; 18 mg (cross-validation: sensitivity = 0.86, specificity = 0.86) and 102 counts/5 s (cross-validation: sensitivity = 0.91, specificity = 0.92) for the non-dominant wrist; and 22 mg and 175 counts/5 s (not cross-validated) for the dominant wrist. MVPA cut-points were 14 mg (cross-validation: sensitivity = 0.70, specificity = 0.99) and 54 count/5 s (cross-validation: sensitivity = 1.00, specificity = 0.96) for the hip; 60 mg (cross-validation: sensitivity = 0.83, specificity = 0.99) and 182 counts/5 s (cross-validation: sensitivity = 1.00, specificity = 0.89) for the non-dominant wrist; and 64 mg and 268 counts/5 s (not cross-validated) for the dominant wrist. These cut-points can classify ST and MVPA in older adults from hip- and wrist-worn accelerometers.
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DOI：
10.1249/mss.0000000000000978
发表时间：
2016-10-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
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通讯作者：
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影响因子：
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4
作者：
Lange-Maia, Brittney S.;Newman, Anne B.;Glynn, Nancy W.
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影响因子：
3.4
作者：
Montoye, Alexander H. K.;Clevenger, Kimberly A.;Kaminsky, Leonard A.
通讯作者：
Kaminsky, Leonard A.
DOI：
10.1123/jmpb.2018-0068
发表时间：
2019-12
期刊：
Journal for the measurement of physical behaviour
影响因子：
--
作者：
John D;Tang Q;Albinali F;Intille S
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