Calibration and Cross-validation of Accelerometry in Children and Adolescents with Cystic Fibrosis
Bianchim, 2022
Description
Cut-points for Euclidean norm minus one (ENMO) and mean amplitude deviation (MAD) per 5-sec for monitors worn at the right hip and each wrist in children and adolescents with and without cystic fibrosis. Across device brands, wear locations, and samples, sensitivity was 80.8-99.0% and specificity was 57.6-86.2%.
Development/Validation
Sample: Youth, 7-17 y, with cystic fibrosis (n=35; 20 males), or healthy controls (n=28, 12 males)
Setting: Laboratory
Activities: Games, stairs, stationary, walking
Criterion: MetaMax Cortex 3B (VO2)
Accelerometer(s): ActiGraph GT9X on right hip and each wrist, GENEActiv on each wrist
Validation approach: Leave-one-out cross-validation
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. MAD per 5-sec is calculated as the mean distance of data points about the mean. Below are the developed cut-points by sample (healthy versus with cystic fibrosis), wear location (hip, each wrist), and device brand (ActiGraph versus GENEActiv).
Source Information
Reference:
Bianchim, M. S., McNarry, M. A., Evans, R., Thia, L., Barker, A. R., Williams, C. A., ... & Mackintosh, K. A. (2022). Calibration and Cross-validation of Accelerometry in Children and Adolescents with Cystic Fibrosis. Measurement in Physical Education and Exercise Science, online first. https://doi.org/10.1080/1091367X.2022.2065919 Link to paper
Corresponding author: Melitta McNarry, M.McNarry@swansea.ac.uk
Contact
Kimberly Clevenger at accelerometerrepository@gmail.com