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Table 1 Data for each outcome variable

From: Comparison of programs for determining temporal-spatial gait variables from instrumented walkway data: PKmas versus GAITRite

 

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%)

  1. *Negative differences indicate GAITRite® higher than PKmas®.
  2. SD = standard deviation.
  3. Mean ± SD, mean difference ± SD and mean absolute percentage error, for each group, each system and each variable.