Table 2.

Preoperative parameters in patients with and without cement loosening

Preoperative parameters	Loosening (+)	Loosening (-)	p-value
Mean age (yr)	76.8	77.3	0.240
Women	39 (73.3)	107 (77.6)	0.672
Wedging angle (°)	36.3	25.9	0.980
Intravertebral instability (°)	6.6	9.8	<0.05
Parkinson's disease	2 (1.9)	11 (28.9)	<0.01
Spinous process fracture	21 (14.4)	20 (40.8)	<0.01
Ankylosing spinal hyperostosis	12 (8.2)	6 (12.2)	0.337
Split vertebrae	5 (3.4)	16 (32.7)	<0.01
Adjacent intervertebral vacuum	15 (10.3)	14 (28.6)	<0.05

Values are presented as number (%).