Spatial Distribution and Asymmetry of Surface Electromyography on Lumbar Muscles of Soldiers with Chronic Low Back Pain

Table 3

Repeat measures ANOVA of entropy, centroid, and dispersion by fatigue and group factors.

		df	F	value
LES_Entropy	Group	1	0.464	0.50
	Fatigue	2	3.167	0.05
	GroupFatigue	2	1.935	0.15
RES_Entropy	Group	1	15.828	<0.0001
	Fatigue	2	0.333	0.72
	GroupFatigue	2	0.63	0.54
LES_CentroidY	Group	1	6.413	0.02
	Fatigue	2	0.292	0.71
	GroupFatigue	2	1.580	0.22
RES_CentroidY	Group	1	1.652	0.21
	Fatigue	2	2.463	0.10
	GroupFatigue	2	0.247	0.74
LES_DispersionY	Group	1	0.151	0.70
	Fatigue	2	0.047	0.95
	GroupFatigue	2	0.186	0.83
RES_DispersionY	Group	1	14.074	0.001
	Fatigue	2	0.246	0.78
	GroupFatigue	2	0.954	0.39

LES: left-side erector spinae muscle; RES: right-side erector spinae muscle; Centroid Y: centroid in y-axis; Dispersion Y: dispersion in y-axis. ANOVA: analysis of variance. Statistically significant (). df: degree of freedom; F: statistic amount of testing.