Quantitative muscle strength assessment in duchenne muscular dystrophy: longitudinal study and correlation with functional measures

Table 2 Baseline correlations

		NS	6MWT (m)	TIME 10 m (s)	Gowers (s)	Isometric KE (N)	Isometric KF (N)	Isocinetic KE (N)	Isocinetic KF (N)	EF (N)
6MWT (m)	r	0.80	1
	p	<0.001
TIME10m (s)	r	−0.93	−0.80	1
	p	<0.001	<0.001
Gowers (s)	r	−0.89	−0.75	0.91	1
	p	<0.001	<0.001	<0.001
Isometric KE (N)	r	0.86	0.70	−0.89	−0.87	1
	p	<0.001	<0.001	0.01	<0.001
Isometric KF (N))	r	0.66	0.60	−0.64	−0.52	0.50	1
	p	<0.001	<0.001	<0.001	0.007	<0.001
Isocinetic KE (N)	r	0.87	0.72	−0.86	−0.88	0.93	0.64	1
	p	<0.001	<0.001	0.01	<0.001	<0.001	<0.001
Isocinetic KF (N)	r	0.64	0.63	−0.68	−0.66	0.62	0.73	0.70	1
	p	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
EF (N)	r	0.63	0.68	−0.65	−0.63	0.63	0.52	0.55	0.59	1
	p	<0.001	<0.001	.01	0.001	<0.001	<0.001	<0.001	<0.001
EF (N)	r	0.75	0.59	−0.84	−0.77	0.75	0.55	0.73	0.65	0.76
	p	<0.001	<0.001	0.01	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001

Abbreviations: r = Pearson correlation coefficient, NS = North Star Scale; 6MWT = 6-min walking test; KE = Knee Extension; KF = Knee Flexion; EE = Elbow Extension; EF = Elbow Flexion.

ISSN: 1471-2377