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Table 3 Validity analysis of the spatiotemporal parameters. The table presents the results for the shoe-type IMU system and motion capture system

From: Validity of shoe-type inertial measurement units for Parkinson’s disease patients during treadmill walking

 

IMU system

Motion capture system

ICC (2,1)

95% CI of ICC min, max

IMU system

Motion capture system

Cadence (steps/min)

108.24e (ste

108.24e (ste

1.000*

97.91–118.56

97.91–118.56

Left step length (cm)

22.11step l

22.26step l

0.990*

15.99–28.24

16.10–28.43

Right step length (cm)

22.53 step

22.37 step

0.999*

15.68–29.39

15.55–29.19

Left step time (s)

0.57 step

0.57 step

0.993*

0.50–0.63

0.51–0.63

Right step time (s)

0.57 t ste

0.57 t ste

0.993*

0.50–0.63

0.51–0.63

  1. m.63: mean and standard deviation; *: results of the correlation analysis, p < 0.001; CI confidence interval, ICC intracorrelation coefficient, IMU inertial measurement unit