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TABLE 1: Patient characteristics
Patients with Cement Leakage into the Disk during Vertebroplasty (n = 18) Patients with No Cement Leakage into the Disk during Vertebroplasty (n = 20)
Average age (yr) 74 80
 Range (yr) 45–89 56–94
Sex 
 Male 8 5
 Female 10 15
Cause 
 Osteoporosis 15 17
 Metastatic disease 3 3

	Patients with Cement Leakage into the Disk during Vertebroplasty (n = 18)	Patients with No Cement Leakage into the Disk during Vertebroplasty (n = 20)
Average age (yr)	74	80
Range (yr)	45–89	56–94
Sex
Male	8	5
Female	10	15
Cause
Osteoporosis	15	17
Metastatic disease	3	3