Table 1.

Basic clinical data

	Group 1	Group 2	Group 3	Group 4	p value
Number of patients	328	317	302	325
Male versus female	146:182	214:103	175:127	227:98
Age	70.93 ± 7.51	63.03 ± 16.16	67.88 ± 14.2	69.45 ± 11.75	<0.001
Number of vertebral bodies involved	472	647	810	a
Number of vertebral bodies with collapse	472	167	141	125
Collapse rate	100%	25.8%	17.4%	a	<0.001
Number of vertebral bodies with intravertebral vacuum phenomena	89	1	0	8
Rateb	18.86%	0.59%	0%	6.4%	<0.001
Patterns	Linear: 44	Unique Pattern (TB)		Linear: 4
	Band: 15			Band: 1
	Cloud: 15			Cloud: 3
	Triangular: 6
	Multiple linear: 9

^aThe correct level(s) of involvement could not be evaluated in group 4

^bThe number of vertebral bodies with intravertebral vacuum phenomenon/number of vertebral bodies involved