Zoledronic Acid May Reduce Intraoperative Bleeding in Spinal Tumors: A Prospective Cohort Study

Table 2

Baseline characteristics in 19 patients with multiple myeloma^a.

Characteristic	Preoperative zoledronic acid group (group C; )	Control group (group D; )
Sex			0.876
Men	7	6
Women	3	3
Age (y)			0.283
Mean ± SD	63.8 ± 4.5	61.7 ± 3.7
Range	55–70	57–67
Preoperative Frankel score			0.322
A	0	0
B	2	0
C	2	4
D	4	2
E	2	3
Number of spinal metastases			0.498
Single	4	5
Multiple	6	4
Tumor location			0.795
Cervical	2	3
Thoracic	5	4
Lumbar	3	2

SD: standard deviation.
^aThe Student’s -test was used for continuous variables, and chi-square analysis was used for categorical variables.