Fig. 3
From: Clinical validation of smartphone-based activity tracking in peripheral artery disease patients
ActiGraph accuracy analysis. Device accuracy was assessed using scatter plots and Bland-Altman plots. a Scatter plot of ActiGraph versus manual step counting. b Bland-Altman plot of ActiGraph versus manual step counting. c Scatter plot of ActiGraph and iPhone step estimation. d Bland-Altman plot comparing iPhone steps and ActiGraph steps. In scatter plots, black dots indicate participants, solid red lines demarcate y = x line, and black dashed lines represent regression lines. The regression equation and coefficient of determination are depicted in the graph’s top left corner. In Bland-Altman plots, solid red lines demarcate the bias and dashed black lines indicate the 95% limits of agreement. Black data points = no walking aid. Yellow data points = walkers. Blue data points = canes
