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Table 3 Foot strike identification

From: Novel algorithm for a smartphone-based 6-minute walk test application: algorithm, application development, and evaluation

Participant Primary acceleration # Steps from video # Steps by algorithm Accuracy Time difference of foot strikes from video (s)
1 Forward 716 716 100.0% 0.02 ± 0.026
2 Forward 695 695 100.0% 0.02 ± 0.012
3 Forward 650 646 99.4% 0.02 ± 0.052
4 Forward 716 716 100.0% 0.01 ± 0.007
5 Forward 650 650 100.0% 0.02 ± 0.011
6 Vertical 663 662 99.9% 0.03 ± 0.030
7 Forward 758 758 100.0% 0.01 ± 0.007
8 Forward 726 726 100.0% 0.01 ± 0.006
9 Forward 752 752 100.0% 0.01 ± 0.011
10 Forward 635 635 100.0% 0.01 ± 0.009
11 Forward 647 647 100.0% 0.01 ± 0.012
12 Forward 607 607 100.0% 0.01 ± 0.008
13 Forward 617 617 100.0% 0.01 ± 0.008
14 Forward 652 652 100.0% 0.01 ± 0.010
15 Forward 746 746 100.0% 0.02 ± 0.020
  1. Time difference is the average and standard deviation across all steps.