TABLE 3.

Results of linear mixed effect models with spatiotemporal parameters as responses in children with DMD.

	Fixed effects
	Intercept	Regression coefficients
		Longitudinal effects				Cross-sectional effects				Interaction effects
		Time		Time2		Baseline age		Baseline age2		Time × Baseline age
Variables	β0	β1	p-value	β2	p-value	β3	p-value	β4	p-value	β6	p-value
Cadence (steps/s)	2.617*	−0.058	0.0019*			−0.124	0.0001*	0.006	0.0266*
WVnorm (/)	0.457*	−0.012	0.0613			−0.011	<0.0001*
SLnorm (/)	0.785*	−0.016	0.0214*			−0.009	0.0026*
SWnorm (/)	0.262*	−0.027	0.0006*	0.005	0.0016*	0.003	0.3895			0.005	<0.0001*

The asterisks (*) indicate significance level at p < 0.05. DMD, Duchenne muscular dystrophy; SLnorm, normalized step length; SWnorm, normalized step width; WVnorm, normalized walking velocity.