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
Migueles, 2021
Description
Cut-points for Euclidean norm minus one (ENMO) per 5-sec for monitors worn at the hip and each wrist developed and cross-validated in older adults (≥70 years of age). Across wear locations, sensitivity and specificity were 61-80% and 64-83%.
Development/Validation
Sample: 59 (29 males) older adults, ≥70 years of age
Setting: Laboratory
Activities: Activities of daily living, overground and treadmill walking, stationary
Criterion: Cosmed K4b2 or K5 (VO2)
Accelerometer(s): ActiGraph GT3X+ on right hip, each wrist
Validation approach: Independent sample cross-validation (n=19)
Instructions
ENMO per 5-sec is calculated as square root of the sum of the squared acceleration in each axis, minus one, with negative values rounded up to zero. Below are the developed cut-points. You can also use the R package GGIR to calculate ENMO and apply these cut-points.
Source Information
Reference:
Migueles, J. H., Cadenas-Sanchez, C., Alcantara, J. M., Leal-Martín, J., Mañas, A., Ara, I., ... & Shiroma, E. J. (2021). 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. Sensors, 21(10), 3326. https://doi.org/10.3390/s21103326 Link to paper
Corresponding author: Eric Shiroma, eric.shiroma@nih.gov
Contact
Kimberly Clevenger at accelerometerrepository@gmail.com