Bland-Altman plots comparing step counts over a 2 min walk test for the Fitbit tracker, ActiGraph accelerometer and visual count by a physiotherapist.

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Volume 133, Issue 5, Pages (May 2008)

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Bland-Altman plots comparing step counts over a 2 min walk test for the Fitbit tracker, ActiGraph accelerometer and visual count by a physiotherapist. Bland-Altman plots comparing step counts over a 2 min walk test for the Fitbit tracker, ActiGraph accelerometer and visual count by a physiotherapist. (A) Comparison between the Fitbit tracker and visual count. (B) Comparison between the Fitbit tracker and ActiGraph accelerometer. (C) Comparison between the ActiGraph accelerometer and visual count. Actigraph_2MWT: ActiGraph step counts from the 2 min walk test. Fitbit_2MWT: Fitbit step counts from the 2 min walk test. Visual_2MWT: Physiotherapist-counted steps from the 2 min walk test. Solid line indicates the mean difference between the two measures, dashed lines indicate the limits of agreement (1.96 SDs of the mean difference). Serene S Paul et al. BMJ Open Sport Exerc Med 2015;1:e000013 ©2015 by BMJ Publishing Group Ltd