Illustrations of the dural sac cross-sectional area measurement technique. (
Mean visual analogue scale preoperatively, in the early postoperatively and on last follow-up. The score decreased significantly between the preoperative and early postoperative phases (p=0.000) and between the early postoperative phase and on last follow-up (p=0.000).
Mean Oswestry disability index preoperatively, in the early postoperatively and on last follow-up. The percentile score decreased significantly between the preoperative and early postoperative phases (p=0.000) and between the early postoperative phase and on last follow-up (p=0.000).
Patient demographics
Variables | ||
---|---|---|
No. of Patients | 103 | |
Gender | Male | 50 (48.5%) |
Female | 53 (51.5%) | |
Age at operation in years (mean±SD) | 61.0±10.8 | |
Symptom duration in months (mean±SD) | 21.5±19.5 | |
Follow-up duration in months (mean±SD) | 17.7±5.4 |
Distribution of spinal levels affected lumbar spinal stenosis and ULBD surgery.
Level | No. of ULBDs (n=103) | % of ULBDs |
---|---|---|
L1-2 | 2 | 1.9 |
L2-3 | 3 | 2.9 |
L3-4 | 9 | 8.7 |
L4-5 | 86 | 83.5 |
L5-S1 | 3 | 2.9 |
ULBD, unilateral laminotomy for bilateral decompression
Correlation between radiologic findings and clinical symptoms
Correlation Coefficient | p-value | |
---|---|---|
Preoperative DSCSA (mm2) | ||
VAS | -0.118 | 0.234 |
ODI (%) | -0.082 | 0.410 |
Expansion ratio of DSCSA (%) | ||
VAS (Pre-Early) | -0.025 | 0.803 |
VAS (Pre-Last) | -0.094 | 0.344 |
ODI (Pre-Early) | -0.080 | 0.420 |
ODI (Pre-Last) | -0.120 | 0.229 |
DSCSA, dural sac cross-sectional area
VAS, visual analogue sclale; ODI, Oswestry disability index
Pre, preoperative; Early, early postoperative; Last, last follow-up