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Table 1 Average values of the sway Radius and the Area measured before and after shunt implantation in NPH patients and in the control group in two conditions: eyes open (EO) and eyes closed (EC).

From: Analysis of postural sway in patients with normal pressure hydrocephalus: effects of shunt implantation

   Control (n = 46) Before Shunt (n = 9) After Shunt (n = 9) P
      B vs. A B vs. C A vs. C
Radius (mm) EO 4.2 ± 1.4 13.5 ± 4.5 6.2 ± 1.5 0.0039 2.6e-09 0.009
  EC 4.9 ± 1.7 13.1 ± 3.8 7.9 ± 2.3 0.0078 5.2e-07 0.015
p (EO vs. EC)   2.1e-04 n.s 0.019    
Area (cm2) EO 4.3 ± 3.3 44.7 ± 26.3 10.8 ± 3.8 0.0039 1.5e-08 6.9e-06
  EC 7.3 ± 7.2 44.6 ± 32.7 20.7 ± 18.7 0.0078 1.5e-08 0.00019
P (EO vs. EC) 2.0e-07 n.s. 0.019    
  1. B vs. A - the NPH group before vs. after operation; B vs. C and A vs. C - the NPH group before and after operation vs. the control group, respectively; The rows depicted as EO vs. EC show statistical significance for comparisons of the measurements with eyes open vs. eyes closed in each group.