Table 4 Clinical and imaging features in patients with and without early-onset ASD after PLIF at L4-5 among cases with vertebral bone edema at L3-4 on preoperative MRI.
Variables | Non-ASD | ASD | p Value |
|---|---|---|---|
Number of patients, n (%) | 18 (13.3%) | 24 (57.1%) | |
Background | |||
Age, years | 73.50 [64.50, 76.00] | 72.50 [63.75, 77.25] | 0.899 |
Sex (male/female) | 8 (44.4%) / 10 (55.6%) | 7 (29.2%) / 17 (70.8%) | 0.347 |
BMI, kg/m2 | 22.95 [20.55, 26.50] | 24.70 [22.08, 27.27] | 0.174 |
Imaging findings | |||
L3-4 Preoperative disc height | 6.10 [4.80, 7.83] | 6.35 [5.60, 7.58] | 0.703 |
L4-S1 angle | 17.95 [13.17, 22.10] | 19.00 [13.70, 24.15] | 0.675 |
L3-4 vacuum phenomenon | 9 (50.0%) | 13 (54.2%) | 1 |
L3-4 bone marrow edema area | 151.35 [108.03, 206.90] | 169.76 [115.07, 276.31] | 0.477 |
Surgical procedure | |||
L3-4 decompression | 8 (44.4%) | 14 (58.3%) | 0.533 |
