Figure 2From: Neck pain and postural balance among workers with high postural demands - a cross-sectional study Ninety-five per cent confidence ellipse area. Illustration of a cleaners sway area (centre of pressure) during the Romberg with eyes open. The y-axis represents the anterior-posterior axis and the x-axis represents the medio-lateral axis. The blue circle illustrates the 95% confidence ellipse area.Back to article page