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Table 2 Comparison between BMD and BSI reproducibility at different thicknesses

From: Bone strain index reproducibility and soft tissue thickness influence: a dual x-ray photon absorptiometry phantom study

  BMD (Fast array)   BSI (Fast array)  
Pork rind thickness 0 cm 1 cm 3 cm 6 cm p value 0 cm 1 cm 3 cm 6 cm p value
SD 0.004 0.003 0.005 0.005 n.s. 0.022 0.018 0.029 0.025 n.s.
CoV 0.4% 0.3% 0.5% 0.5%   1.0% 0.8% 1.3% 1.2%  
LSC 1.0% 0.9% 1.3% 1.4%   2.8% 2.3% 3.7% 3.3%  
Reproducibility 99.0% 99.1% 98.7% 98.6%   97.2% 97.7% 96.3% 96.7%  
  BMD (Array)   BSI (Array)  
Pork rind thickness 0 cm 1 cm 3 cm 6 cm   0 cm 1 cm 3 cm 6 cm  
SD 0.003 0.004 0.004 0.005 n.s. 0.019 0.023 0.017 0.023 n.s.
CoV 0.3% 0.4% 0.4% 0.5%   0.9% 1.1% 0.8% 1.1%  
LSC 0.7% 1.2% 1.1% 1.3%   2.5% 3.0% 2.2% 3.0%  
Reproducibility 99.3% 98.8% 98.9% 98.7%   97.5% 97.0% 97.8% 97.0%  
  BMD (HD)   BSI (HD)  
Pork rind thickness 0 cm 1 cm 3 cm 6 cm   0 cm 1 cm 3 cm 6 cm  
SD 0.002 0.003 0.004 0.006 < 0.001 0.013 0.012 0.022 0.029 < 0.001
CoV 0.2% 0.3% 0.4% 0.6%   0.6% 0.6% 1.1% 1.4%  
LSC 0.6% 0.7% 1.1% 1.6%   1.8% 1.7% 3.0% 3.9%  
Reproducibility 99.4% 99.3% 98.9% 98.4%   98.2% 98.3% 97.0% 96.1%  
  1. BMD Bone mineral density, BSI Bone strain index, HD High definition, CoV Coefficient of variation, SD Standard deviation, LSCLeast significant change percentage, 0 cm Absence of interposed soft tissue, n.s. Not statistically significant