Table 2.

Multivariate linear regression analysis comparing postoperative outcomes. P values are adjusted for age, sex, number of segments operated on, and whether or not an interbody cage was placed.

	CBT group	PS group	P
Mean improvement in VAS score (%)
Back	43.8 ± 31	34.8 ± 55.7	.85
Leg	44.2 ± 36.4	36.3 ± 50.6	.99
Improvement in ODI (%)	33.2 ± 18.7	30.1 ± 53.3	.56
Mean LOS (days)	3.6 ± 1.7	4.6 ± 2.3	.02
Mean EBL (mL)	186 ± 114.3	413.7 ± 290.0	.008
Median POD of ambulation	1	2	.91
Mean operative time (minutes)	192 ± 131.7	226 ± 84.7	.56
No. of patients with screw pullout	2	2	—

Abbreviations: CBT, cortical bone trajectory; PS, pedicle screw; VAS, visual analog scale; ODI, Oswestry Disability Index; LOS, length of stay; EBL, estimated blood loss; POD, postoperative day.