Table 3.

Summary for spinal BMD measurement results by PB-QCT and automatic PL-QCT.

Variables	Spine vBMD ($\mathit{mg}/\mathit{c}{\mathit{m}}^3$)
Number	63
Mean $\pm$ SD (phantom-based)	90/07 ±48.48
Mean $\pm$ SD (phantom-less)	94.11 $\pm 45.97$
Difference	2.95 $\pm$ 6.95
95% confidence interval	[1.30, 4.61]
t statistic	3.56
P	0.6007