Unit-specific calibration of Actigraph accelerometers in a mechanical setup – Is it worth the effort? The effect on random output variation caused by technical inter-instrument variability in the laboratory and in the field |
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| Authors: | Niels C Moeller Lars Korsholm Peter L Kristensen Lars B Andersen Niels Wedderkopp Karsten Froberg |
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| Institution: | (1) Institute of Sport Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark;(2) Department of Statistics, University of Southern Denmark, Odense, Denmark;(3) The Back Research Center, Ringe, Denmark;(4) Department of Sports Medicine, Norwegian School of Sport Sciences, Oslo, Norway |
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| Abstract: | Background Potentially, unit-specific in-vitro calibration of accelerometers could increase field data quality and study power. However,
reduced inter-unit variability would only be important if random instrument variability contributes considerably to the total
variation in field data. Therefore, the primary aim of this study was to calculate and apply unit-specific calibration factors
in multiple accelerometers in order to examine the impact on random output variation caused by inter-instrument variability. |
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