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Table 3 Pearson correlation coefficients (r), followed by Bland-Altman offsets (mm) and limits of agreement (95%CIs) for sway measures, as determined from Swaymeter recordings, against those taken from forceplate (COP) recordings.

From: Validity and reliability of the Swaymeter device for measuring postural sway

  Floor Foam
  Eyes open Eyes closed Eyes open Eyes closed
AP displacement
Offset (95%CI)
r = 0.743
4.5(-6.8-15.7)
r = 0.845
6.8(-3.2-16.7)
r = 0.820
9.5(-4.9-23.8)
r = 0.865
15.6(-5.2-36.4)
ML displacement
Offset (95%CI)
r = 0.692
-4.1(-19.5-11.3)
r = 0.752
-5.4(-25.0-14.2)
r = 0.733
0.1(-19.0-19.3)
r = 0.807
-2.7(-30.1-24.7)
Path length
Offset (95%CI)
r = 0.667
231.0(68.6-393.4)
r = 0.754
275.5(-58.1-609.1)
r = 0.560
409.2(55.1-763.3)
r = 0.858
590.0(-363.9-1543.9)