
Factor 1

Factor 2

Factor 3

Factor 4


(Regularity)

(Pace)

(Variability)

(Smoothness)


Walking speed

0.01

0.79

0.01

0.00

Mean stride time

0.00

0.80

−0.05

0.01

CV of stride time

0.12

−0.06

0.81

−0.06

CV of swing time

−0.09

0.02

0.65

0.11

ACVT

0.77

0.20

0.05

− 0.07

ACML

0.83

−0.07

−0.13

0.17

ACAP

0.83

−0.08

0.11

−0.07

HRVT

0.01

0.05

0.18

0.51

HRML

0.09

−0.08

−0.14

0.69

HRAP

−0.07

0.08

0.14

0.56

% of variance

30.1

11.3

9.9

5.9

Factor correlation matrix

Factor 2

0.29

1
  
Factor 3

0.53

0.22

1
 
Factor 4

0.23

0.21

0.33

1

 The variables presented in boldface signify variables that loaded on each of the four factors above 0.5
 CV: coefficient of variation, AC: autocorrelation coefficient, VT: vertical, ML: mediolateral, AP: anteroposterior, HR: harmonic ratio