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Appears in Collections:Faculty of Health Sciences and Sport Journal Articles
Peer Review Status: Refereed
Title: Calibration and Cross-validation of Accelerometry in Children and Adolescents with Cystic Fibrosis
Author(s): Bianchim, Mayara S
McNarry, Melitta A
Evans, Rachel
Thia, Lena
Barker, Alan R
Williams, Craig A
Denford, Sarah
Mackintosh, Kelly A
Keywords: Threshold
physical activity
Issue Date: 20-Apr-2022
Date Deposited: 23-May-2022
Citation: Bianchim MS, McNarry MA, Evans R, Thia L, Barker AR, Williams CA, Denford S & Mackintosh KA (2022) Calibration and Cross-validation of Accelerometry in Children and Adolescents with Cystic Fibrosis. Measurement in Physical Education and Exercise Science.
Abstract: Commonly used cut-points may misclassify physical activity (PA) in people with cystic fibrosis (CF). The aim of this study was to develop and cross-validate condition-specific cut-points in children and adolescents with CF. Thirty-five children and adolescents with CF (15 girls; 11.6 ± 2.8 years) and 28 controls (16 girls; 12.2 ± 2.7 years), had their energy expenditure and triaxial acceleration measured during six daily activities of varying intensities. Euclidean Norm Minus One (ENMO) and Mean Amplitude Deviation (MAD) were extracted using both GENEActiv (both wrists) and ActiGraph GT9X (both wrists and right waist) accelerometers. ROC curves were used to determine healthy and CF-specific raw acceleration cut-points for sedentary time (SED), moderate physical activity (MPA) and vigorous physical activity (VPA). The PA cut-points were generally lower in CF compared to controls for both ENMO (60.2–73.1 vs. 63.5–86.8 mg) and MAD (58.9–85.2 vs. 75.9–93.7 mg). These substantial inter-cut-point differences support the need for disease-specific cut-points.
DOI Link: 10.1080/1091367x.2022.2065919
Rights: © 2022 The Author(s). Published with license by Taylor & Francis Group, LLC. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Notes: Output Status: Forthcoming/Available Online
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