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Table 2 Precision of the VerteTrack RIH displacement

From: The bench-top accuracy of the VerteTrack spinal stiffness assessment device

Wedge level

RIH displacement relative to table-topa (mm)

95%CI (mm)

SD

CV

d0 (landing point)

60.03

60.01 to 60.05

0.04

0.01%

d1 (highest level)

60.02

60.02 to 60.02

0.01

0.00%

d2

48.30

48.29 to 48.31

0.01

0.00%

d3

36.13

36.12 to 36.13

0.01

0.01%

d4

23.82

23.82 to 23.83

0.01

0.01%

d5 (lowest level)

12.08

12.00 to 12.16

0.14

0.32%

  1. CV Coefficient of variation, RIH Rolling indenter head, SD standard deviation
  2. aAverage of 10 measurements at each displacement. All displacements were measured by the string potentiometer relative to the table-top (TE Connectivity, USA, Resolution = 0.020 mm, accuracy ±0.010 mm)