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Table 2 Correlation coefficients and p values for the three test forces versus CT parameters on micro-CT and multislice CT

From: Quantitative CT-based bone strength parameters for the prediction of novel spinal implant stability using resonance frequency analysis: a cadaveric study involving experimental micro-CT and clinical multislice CT

   Micro-CT (n = 68) Multislice CT (n = 58)
ρ p ρ p
Peak torque versus Volume bone mineral density 0.520 5.46 × 10−6* 0.463 2.50 × 10−4*
Bone volume/total volume 0.550 1.19 × 10−6* 0.334 0.0103
Bone surface/total volume 0.811 4.96 × 10−17* 0.730 7.87 × 10−11*
Trabecular thickness 0.427 2.79 × 10−4* 0.479 1.41 × 10−4*
Trabecular separation − 0.588 1.38 × 10−7* − 0.267 0.0424
Trabecular number 0.582 1.95 × 10−7* − 0.489 9.66 × 10−5*
Structure model index − 0.437 1.96 × 10−4* N.A. N.A.
Node number/total volume 0.428 2.71 × 10−4* − 0.069 0.608
Pull-out versus Volume bone mineral density 0.453 1.06 × 10−4* 0.414 0.00124*
Bone volume/total volume 0.467 5.86 × 10−5* 0.320 0.0143
Bone surface/total volume 0.730 1.64 × 10−12* 0.693 1.64 × 10−9*
Trabecular thickness 0.361 0.00250* 0.416 0.00118*
Trabecular separation − 0.519 5.68 × 10−6* − 0.272 0.0391
Trabecular number 0.529 3.54 × 10−6* − 0.411 0.00137*
Structure model index − 0.360 0.00253* N.A. N.A.
Node number/total volume 0.483 3.02 × 10−5* − 0.108 0.421
Implant stability quotient value versus Volume bone mineral density 0.0722 0.558 − 0.103 0.444
Bone volume/total volume 0.0666 0.589 − 0.0760 0.571
Bone surface/total volume 0.237 0.0521 0.201 0.130
Trabecular thickness − 0.0542 0.661 − 0.106 0.427
Trabecular separation − 0.158 0.197 0.0770 0.566
Trabecular number 0.264 0.0299 0.0830 0.536
Structure model index − 0.0134 0.914 N.A. N.A.
Node number/total volume 0.607 4.01 × 10−8* 0.515 3.52 × 10−5*
  1. CT computed tomography, N.A. not available
  2. *Signifiant p value