Table 3.

The comparison of L1 vertebral HU value of two groups

	Study group	Control group	t/Z	P
Axial-HU	47.77 ± 22.38 HU	80.23 ± 30.26	4.880	< 0.001*
Sagittal-HU	46.17 ± 21.31 HU	75.69 ± 29.72	− 4.196	< 0.001#
t/Z	0.650	− 1.580
P	0.520*	0.114#

^*Student’s t-test.

^#Mann–Whitney’s U test.