Figure 3

Comparison between phases and groups in COP variables during eyes-open stance in (A) 95% confidence ellipse area, (B) mean velocity, (C) range-AP, (D) range-ML, (E) RMS distance-AP and (F) RMS distance-ML. 0 M: myelopathy group at preoperative phase; 3 M: myelopathy group at postoperative 3 months; 6 M: myelopathy group at postoperative 6 months; 1Y: myelopathy group at postoperative 1 year; Control: age-matched control group. *Significant difference between phases of surgery (p < 0.05). §Significant difference between myelopathy group and age-matched control group (p < 0.05).