Table 1 Clinical data and imaging findings in patients with and without early-onset ASD.
Variables | Non-ASD | ASD | p Value |
|---|---|---|---|
Number of patients, n (%) | 135 (79.4%) | 35 (20.6%) | |
Background | |||
Age, years | 68.00 [61.00, 74.50] | 68.00 [63.00, 75.50] | 0.608 |
Sex (male/female) | 51 (37.8%) / 84 (62.2%) | 9 (25.7%) / 26 (74.3%) | 0.184 |
BMI, kg/m2 | 23.30 [21.80, 25.70] | 23.30 [21.55, 26.60] | 0.489 |
Smoking habit | 36 (26.7%) | 7 (20.0%) | 0.516 |
Preoperative JOA score | 17.00 [14.00, 19.00] | 17.00 [15.00, 19.00] | 0.833 |
Imaging findings | |||
Preoperative % slip, % | 19.00 [14.00, 24.00] | 23.00 [19.50, 28.00] | 0.003* |
Δ% slip, % | 14.00 [8.75, 18.55] | 17.00 [11.50, 20.30] | 0.069 |
L-DISH | 17 (20.7%) | 3 (8.6%) | 0.769 |
Preoperative PI, degrees | 50.00 [43.00, 56.00] | 49.00 [38.75, 52.00] | 0.191 |
Preoperative LL, degree | 36.00 [28.00, 43.00] | 35.00 [27.00, 40.00] | 0.383 |
Δ LL, degree | 0.00 [− 3.50, 3.00] | 2.00 [− 4.50, 4.00] | 0.737 |
Preoperative PI-LL, degrees | 15.00 [9.00, 21.50] | 15.00 [9.00, 22.00] | 0.955 |
Postoperative PI-LL, degrees | 15.00 [8.00, 20.00] | 15.00 [8.50, 20.00] | 0.71 |
L3-4 vacuum phenomenon | 20 (14.8%) | 14 (40.0%) | 0.002* |
L3-4 bone marrow signal change | |||
bone marrow edema (type I ) | 18 (13.3%) | 24 (68.6%) | < 0.001* |
fatty conversion (type II) | 19 (14.1%) | 1 (2.9%) | 0.080 |
endplate sclerosis (type III) | 1 (0.7%) | 0 (0.0%) | 1 |
Surgical procedure | |||
Splitting laminotomy | 22 (16.3%) | 10 (28.6%) | 0.143 |
PPS | 28 (20.7%) | 11 (31.4%) | 0.184 |
Cage height, mm | 9.00 [8.00, 10.00] | 8.00 [8.00, 9.00] | 0.027* |
Disc space distraction, mm | 2.80 [1.60, 3.60] | 3.70 [2.75, 5.45] | 0.003* |
L3-4 decompression | 31 (23.0%) | 19 (54.3%) | 0.001* |
