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

Table 1 Precision of VerteTrack applied load

Indenter head loading	Load_VerteTrack^a (N)	95%CI (N)	SD	CV
RIH only	16.557	16.470 to 16.645	0.045	0.27%
RIH + 1 plate	27.757	27.701 to 27.814	0.029	0.10%
RIH + 2 plates	38.662	38.589 to 38.735	0.037	0.10%
RIH + 3 plates	49.583	49.479 to 49.688	0.053	0.11%
RIH + 4 plates	60.687	60.592 to 60.783	0.049	0.08%
RIH + 5 plates	71.461	71.420 to 71.502	0.021	0.03%

CV Coefficient of variation, RIH Rolling indenter head, SD standard deviation
^aAverage of 10 measurements at each load. All loads measured with digital scale (OHAUS, model TS4KD: Resolution = 0.1 g, accuracy ±0.07 g. Equivalent to resolution = 0.001 N, accuracy ±0.0007 N)

ISSN: 2045-709X