Number of Days Required to Estimate Habitual Activity Using Wrist-Worn GENEActiv Accelerometer: A Cross-Sectional Study
Dillon, 2016
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Last update: January 15, 2022. Updates will occur every 3 months.
Description
Description
Cut-points for classifying physical activity intensity from signal magnitude vector generated for adults wearing GENEActiv monitors on each wrist. Sensitivity and specificity ranged from 67.9 to 97.1% and 67.9 to 97.0%, respectively.
Development/Validation
Development/Validation
Sample: 56 adults, 18-65 y of age
Setting: NR
Activities: Activities of daily living, stationary, walking/running
Criterion: Cosmed K4b2 (VO2)
Accelerometer(s): GENEActiv on each wrist
Validation approach: Comparison to criterion
Instructions
Instructions
SVM is calculated using the equation below as the square root of the sum of the squared acceleration in each axis, minus gravity, summed over the 15-sec epoch. However, as noted in the R package GGIR, both sets of cut-points would be sensitive to sampling rate (30 and 100 Hz in the original study), so they provide a scaled version which can be applied to any raw acceleration data.
Source Information
Source Information
Reference:
Dillon, C. B., Fitzgerald, A. P., Kearney, P. M., Perry, I. J., Rennie, K. L., Kozarski, R., & Phillips, C. M. (2016). Number of days required to estimate habitual activity using wrist-worn GENEActiv accelerometer: a cross-sectional study. PloS one, 11(5), e0109913. https://doi.org/10.1371%2Fjournal.pone.0109913 Link to Paper.
Corresponding author: Christina Dillon, c.dillon@ucc.ie
Contact
Contact
Kimberly Clevenger at accelerometerrepository@gmail.com
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