Table 1.  Mean (± standard deviation) of Center of Pressure (CoP) measures for individuals with ACL reconstruction (ACLr) and typical individuals (Controls) during normal quite stance and one leg stance (OLS). For each group comparison, the F-ratio resulting from the analysis of variance and the relevant p value are presented.
 ACL reconstruction Controls F-ratio, p value One leg Stance Operated (Right) Non-operated (left) Right Left CoPsd M/L (mm) .60 (.33) .51 (.20) .34 (.16) * .36 (.12) 7.64, p = .010 CoPsd A/P (mm) .83 (.41) .68 (.28) .44 (.24) * .47 (.23) * 7.69, p = .007 Total CoP path (mm) 384.5 (186.4) 304.9 (99.1) # 316.5 (89.0) * 324.4 (84.1) 12.32, p = 0.01 CoP Speed (mm/s) 20.37 (14.34) 17.21 (6.41) 12.21 (4.90) * 12.42 (5.45) * 4.87, p = .034 Sway area (mm2) 44173 (18101) 41100 (9681) 34104 (17232) * 34184 (15684) * 5.35, p = .031 Normal Quite Stance CoPsd M/L (mm) 1.58 (.11) * .72 (.51) 6.96, p = .013 CoPsd A/P (mm) 2.30 (1.31) * .67 (.26) 12.32, p = .01 Total CoP path (mm) 61.8 (43.0) * 29.1 (10.9) 8.69, p = .006 CoP Speed (mm/s) 2.33 (1.47) * 1.07 (.47) 9.41, p = .005 Sway area (mm2) 6526 (4392) * 3185 (1412) 8.35, p = .007
CoPsd M/L : standard deviation of the CoP in the mediolateral axis; CoPsd A/P : standard deviation of the CoP in the anteroposterior axis; *: significantly lower compared with the same leg of the ACL group; # significant different compared with the other leg of the same group, p < 0.05.