Fig. 4
From: Clinical validation of smartphone-based activity tracking in peripheral artery disease patients
Steps vs Ankle-brachial index and distance vs. ankle-brachial index. Ankle-brachial indices (ABI) were measured for each leg, and the lower ABI of the two legs were used for each participant. Participants with ABI’s > 1.4 or who required toe-brachial indices were excluded (n = 15). a Steps are plotted as measured by the reference, manual step counting. b Distance is plotted as measured by the reference, distance traveled in the 6-min walk test
