Table 5.

Mean speed of oscillation of the center of pressure

Group	Condition 1 Mean (SE)	Condition 2 Mean (SE)	Condition 3 Mean (SE)	Condition 4 Mean (SE)
Low back pain (n = 21)	2.64a,d (0.20)	2.72b,e (0.19)	5.97c,d,e (0.26)	12.97*,a,b,c (0.84)
Control (n = 23)	2.57a,d (0.21)	2.75b,e (0.35)	5.18c,d,e (0.20)	10.55a,b,c (0.70)
Mean of the difference (CI 95 %)	−0.06 (−0.66; 0.53)	0.04 (−0.80; 0.87)	−0.79 (−1.45; 0.13)	−2.42 (−4.62; −0.22)
p value	0.925	0.957	0.312	0.004

Data expressed in centimeters per seconds

SE standard error, CI confidence interval

* Groups are statistically different (p < 0.05)

^a,b,c,d,eIn pairs, identify which values are statistically different between the four conditions, in each group, after multiple comparison test (ANOVA two way) and Post hoc Tukey test (p < 0.05)