Retrospective comparison of cortical bone trajectory and pedicle screw in lumbar fusion for patients over 80, including sagittal balance: a single-center study

Table 2 Patients’ demographics and preoperative characteristics in the two groups

	PLIF c CBT (n = 44)	PLIF c PS (n = 24)	P-value
Male:Female	17:27	12:12	0.373
Age (years)	81.8 ± 1.9	81.0 ± 1.4	0.070
Height (cm)	155.4 ± 9.5	157.1 ± 9.5	0.493
Weight (kg)	58.8 ± 9.0	59.9 ± 9.6	0.638
BMI (kg/m²)	24.4 ± 3.4	24.3 ± 3.4	0.926
ASA classification	2.0 ± 0.5	2.0 ± 0.6	0.628
CCI	4.8 ± 1.0	4.8 ± 1.2	0.945
Follow-up duration (month)	25.6 ± 21.1	30.6 ± 32.8	0.507
Interbody fusion levels (mean)	1.41 ± 0.5	1.5 ± 0.5	0.478
Pelvic tilt (%)			0.402
< 20°	15 (34.1)	8 (33.3)
> 20° but ≤ 30°	16 (36.4)	12 (50.0)
> 30°	13 (29.5)	4 (16.7)
PI-LL mismatch (%)			0.550
< 10°	16 (36.4)	7 (29.2)
> 10° but ≤ 20°	12 (27.3)	5 (20.8)
> 20°	16 (36.4)	12 (50.0)

Data are presented as mean ± standard deviation or number (%)
PLIF c CBT Posterior lumbar interbody fusion with cortical bone trajectory, PLIF c PS Posterior lumbar interbody fusion with pedicle screw, BMI Body mass index, ASA American Society of Anesthesiologists, CCI Charlson comorbidity index, PI-LL Pelvic incidence-lumbar lordosis

ISSN: 1471-2318