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|Title:||A basis for harmonisation of accelerometer physical activity outcomes in epidemiology|
|Citation:||Journal for the Measurement of Physical Behaviours, 2019, In Press|
|Abstract:||Introduction: To capitalise on the increasing availability of accelerometry data for epidemiological research it is desirable to compare and/or pool data from surveys worldwide. This study aimed to establish whether free-living physical activity outcomes can be considered equivalent between three research-grade accelerometer brands worn on the dominant and non-dominant wrist. Of prime interest were the average acceleration (ACC) and the intensity gradient (IG); these two metrics describe the volume and intensity of the complete activity profile, further they are comparable across populations making them ideal for comparing and/or pooling activity data. Methods: Forty-eight adults wore a GENEActiv, Axivity and ActiGraph on both wrists for up to 7-days. Data were processed using opensource software (GGIR) to generate physical activity outcomes, including ACC and IG. Agreement was assessed using pairwise 95% equivalence tests (±10% equivalence zone) and intra-class correlation coefficients (ICC). Results: ACC was equivalent between brands when measured at the non-dominant wrist (ICC>0.93), but approximately 10% higher when measured at the dominant wrist (GENEActiv and Axivity only, ICC>0.83). The IG was equivalent irrespective of monitor brand or wrist (ICC>0.88). After adjusting ACC measured at the dominant wrist by -10% (GENEActiv and Axivity only), ACC was also within (or marginally outside) the 10% equivalence zone for all monitor pairings. Conclusion: If average acceleration is decreased by 10% for studies deploying monitors on the dominant wrist (GENEActiv and Axivity only), ACC and IG may be suitable for comparing and/or collating physical activity outcomes across accelerometer datasets, regardless of monitor brand and wrist.|
|Embargo on file until:||1-Jan-10000|
|Rights:||Copyright © 2019, Human Kinetics. Deposited with reference to the publisher’s open access archiving policy. (http://www.rioxx.net/licenses/all-rights-reserved)|
|Description:||Anonymised datasets generated during the current study are available on reasonable request.
Requests for access to data should be addressed to the corresponding author at
firstname.lastname@example.org. All proposals requesting data access will need to specify how it is
planned to use the data, and all proposals will need approval of the co-investigator team
before data release.|
The file associated with this record is under embargo until publication, in accordance with the publisher's self-archiving policy. The full text may be available through the publisher links provided above.
|Appears in Collections:||Published Articles, Dept. of Cardiovascular Sciences|
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|Final_submitted_Free-living equivalency.pdf||Post-review (final submitted author manuscript)||1.5 MB||Adobe PDF||View/Open|
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