TABLE 3.

Demographic, operative, and perioperative data for matched cohorts of PABD and NoPABD patients^*

Variable	NoPABD (n = 50)	PABD (n = 50)	p Value†
Age, yrs	44.4 ± 17.1	48.7 ± 17.6	0.215
Sex			0.358
Female	36 (77)	42 (84)
Male	11 (23)	8 (16)
NR	3	0
BMI, kg/m2	25.7 ± 6.1	25.4 ± 6.5	0.834
CCI score	0.74 ± 1.2	0.76 ± 1.1	0.931
ASA score	2.0 ± 0.5	1.9 ± 0.7	0.196
Nicotine use			0.766
No	43 (86)	44 (88)
Yes	7 (14)	6 (12)
Cardiac comorbidity			0.334
No	41 (82)	37 (74)
Yes	9 (18)	13 (26)
Total levels fused	7.8 ± 4.6	9.2 ± 4.1	0.115
Osteotomy performed			0.307
No	1 (2)	3 (6)
Yes	49 (98)	47 (94)
Osteotomy type‡
Posterior column	1.9 ± 3.0	1.9 ± 2.7	0.869
3-Column osteotomy	3 (6.0)	10 (20)	0.084
Total Interbody Fusions	1.1 ± 1.5	1.4 ± 1.7	0.320
ALIF	11 (22.0)	5 (10.0)	0.102
PLIF	2 (4.0)	6 (12.0)	0.140
TLIF	7 (14.0)	8 (16.0)	0.779
XLIF	7 (14.0)	3 (6.0)	0.182
Transsacral	0 (0)	9 (18.0)	0.002
Total operative time, min	364.7 ± 200.4	375.2 ± 161.2	0.773
Total EBL, ml	1393.4 ± 2445.0	2311.6 ± 1467.4	0.025
Donated blood, ml	NA	665.2 ± 272.9
Total AUTO blood transfused, ml§	NA	386.6 ± 549.6
Total ALLO blood transfused, ml	326.5 ± 1220.3	177.5 ± 382.4	0.413

^*Unless otherwise specified, values are expressed as the mean ± SD or the number of patients (%).

^†Independent Student t-test for continuous variables except Total EBL (Mann-Whitney U); chi-square test for categorical variables. Values in bold are statistically significant.

^‡Posterior column osteotomy reported as average levels per case. Three-column osteotomy includes pedicle subtraction, vertebral column resection, and corpectomy.

^§Excluding intraoperative cell salvage.