Healthy group | Hip fracture group | |||||
---|---|---|---|---|---|---|
GAITRite® (mean ± SD) | PKMAS® (mean ± SD) | Mean difference* ± SD (% error) | GAITRite® (mean ± SD) | PKMAS® (mean ± SD) | Mean difference* ± SD (% error) | |
Speed (cm/s) | 129 ± 21 | 129 ± 21 | 0.3 ± 0.6 (0.4%) | 60 ± 22 | 61 ± 23 | 0.4 ± 0.5 (0.9%) |
Cadence (steps/min) | 110 ± 10 | 110 ± 10 | −0.1 ± 0.2 (0.1%) | 93 ± 15 | 92 ± 15 | −0.0 ± 0.1 (0.1%) |
Stride length (cm) | 140 ± 16 | 140 ± 16 | −0.0 ± 0.2 (0.1%) | 78 ± 25 | 78 ± 25 | 0.1 ± 0.6 (0.3%) |
Step length (cm) | 70 ± 8 | 70 ± 8 | −0.1 ± 0.4 (0.5%) | 39 ± 13 | 39 ± 13 | 0.2 ± 0.3 (0.7%) |
Stride duration (s) | 1.1 ± 0.1 | 1.1 ± 0.1 | 0.00 ± 0.00 (0.04%) | 1.3 ± 0.2 | 1.3 ± 0.2 | 0.00 ± 0.00 (0.1%) |
Step duration (s) | 0.55 ± 0.05 | 0.55 ± 0.05 | 0.000 ± 0.003 (0.5%) | 0.67 ± 0.11 | 0.67 ± 0.11 | −0.001 ± 0.004 (0.5%) |
Stance duration (s) | 0.69 ± 0.07 | 0.69 ± 0.07 | 0.003 ± 0.006 (1.2%) | 0.93 ± 0.18 | 0.94 ± 0.18 | 0.011 ± 0.019 (1.4%) |
Swing duration (s) | 0.41 ± 0.03 | 0.41 ± 0.03 | −0.002 ± 0.004 (0.5%) | 0.40 ± 0.08 | 0.40 ± 0.08 | −0.004 ± 0.007 (1.3%) |
Double support duration (s) | 0.28 ± 0.04 | 0.28 ± 0.05 | 0.004 ± 0.008 (1.5%) | 0.53 ± 0.16 | 0.53 ± 0.16 | 0.009 0.013 (1.8%) |
Stance time as a percentage of cycle time (%) | 62.6 ± 1.3 | 62.8 ± 1.4 | 0.17 ± 0.35 (0.3%) | 69.6 ± 4.5 | 69.9 ± 4.5 | 0.30 ± 0.46 (0.5%) |
Double support time as a percentage of cycle time (%) | 25.3 ± 2.6 | 25.7 ± 2.8 | 0.39 ± 0.84 (2.1%) | 39.3 ± 8.9 | 39.8 ± 9.1 | 0.52 ± 0.98 (1.9%) |
Base width (cm) | 8.7 ± 2.5 | 7.1 ± 2.8 | −1.64 ± 0.71 (21.4%) | 10.4 ± 3.7 | 8.9 ± 3.9 | −1.58 ± 1.00 (19%) |
Foot angle (°) | 6.8 ± 3.8 | 7.5 ± 3.7 | 0.65 ± 1.02 (66%) | 7.7 ± 5.7 | 8.5 ± 5.6 | 0.76 ± 0.82 (40%) |
Variability (SD) in Stride Length (cm) | 2.4 ± 1.2 | 2.6 ± 1.2 | 0.17 ± 0.50 (28%) | 4.1 ± 1.9 | 4.1 ± 1.8 | 0.00 ± 0.43 (9%) |
Variability (SD) in Step Length (cm) | 1.6 ± 0.7 | 1.7 ± 0.8 | 0.03 ± 0.55 (32%) | 2.7 ± 1.1 | 2.7 ± 1.0 | −0.08 ± 0.56 (17%) |
Variability (SD) in Stride Duration (s) | 0.02 ± 0.01 | 0.02 ± 0.01 | 0.001 ± 0.003 (7%) | 0.07 ± 0.04 | 0.07 ± 0.04 | 0.000 ± 0.002 (2.3%) |
Variability (SD) in Step Duration (s) | 0.01 ± 0.01 | 0.01 ± 0.01 | −0.001 ± 0.005 (20%) | 0.04 ± 0.02 | 0.04 ± 0.02 | −0.001 ± 0.004 (8%) |
Variability (SD) in Step Width (cm) | 1.9 ± 0.9 | 2.0 ± 0.9 | 0.05 ± 0.18 (9%) | 1.8 ± 0.8 | 2.0 ± 0.9 | 0.12 ± 0.23 (11%) |