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. Author manuscript; available in PMC: 2018 Jul 1.
Published in final edited form as: Gait Posture. 2017 Apr 30;56:19–23. doi: 10.1016/j.gaitpost.2017.04.030

Table 1.

Repeatability measures of the low-cost 2D webcam system.

1.0
mph
1.5
mph
2.0
mph
2.5
mph
3.0
mph
3.5
mph
4.0
mph
ICC

Hip Excursion 0.88 0.82 0.83 0.84 0.89 0.92 0.81
Peak Extension 0.76 0.76 0.75 0.80 0.84 0.77 0.83
Peak Flexion Stance 0.85 0.90 0.91 0.88 0.88 0.88 0.79
Peak Flexion Swing 0.89 0.87 0.87 0.85 0.85 0.84 0.81

Knee Excursion 0.78 0.85 0.88 0.93 0.90 0.93 0.85
Peak Extension Stance 0.84 0.86 0.85 0.83 0.77 0.77 0.85
Peak Flexion Stance 0.84 0.85 0.77 0.86 0.82 0.76 0.89
Peak Flexion Swing 0.86 0.89 0.88 0.91 0.90 0.90 0.86
Stance Excursion 0.84 0.86 0.91 0.90 0.93 0.89 0.91

MDC

Hip Excursion 3.5° (10.6) 4.8° (14.1) 3.4° (9.31) 3.4° (8.87) 3.0° (7.41) 2.6°(6.2 0) 5.1° (11.9)
Peak Extension 4.9° (37.4) 5.5° (42.2) 5.1° (37.8) 4.5° (30.2) 4.1° (25.5) 4.5° (26.2) 4.0° (21.7)
Peak Flexion Stance 4.7° (31.9) 3.4° (19.8) 3.2° (17.5) 4.1° (20.6) 3.7° (17.5) 3.6° (16.5) 4.9° (21.2)
Peak Flexion Swing 3.6° (18.0) 3.7° (17.5) 3.6° (15.7) 3.8° (15.9) 4.1° (16.8) 4.0° (16.5) 4.4° (17.7)

Knee Excursion 5.4° (9.16) 5.4° (8.88) 4.4° (6.70) 3.7° (5.36) 4.5° (6.54) 3.6° (5.42) 5.1° (7.77)
Peak Extension Stance 5.0° (625) 4.4° (347) 4.2° (312) 4.5° (225) 5.6° (280) 5.4° (265) 4.5° (223)
Peak Flexion Stance 4.7° (35.7) 5.0° (31.4) 7.1° (33.4) 6.7° (28.1) 7.3° (28.8) 8.0° (29.1) 4.7° (16.2)
Peak Flexion Swing 5.4° (9.47) 5.2° (8.81) 5.0° (7.89) 4.2° (6.49) 4.8° (7.41) 4.4° (6.99) 5.2° (8.22)
Stance Excursion 3.8° (27.5) 4.9° (28.6) 4.9° (21.8) 6.5° (24.9) 4.4° (16.2) 4.9° (16.5) 4.1° (13.3)

Abbreviations: ICC (intraclass correlation coefficient); MDC (minimal detectable change); 2-D (two-dimensional); mph (miles per hour). Values within parentheses indicate MDC values as a percentage of mean scores.