Table 1 Preoperative demographic data
Characteristics | PETD group (n = 11) | PTL group (n = 9) | P value |
|---|---|---|---|
Age (years) | 61.9 ± 7.1 | 60.8 ± 7.2 | 0.73 |
Sex (male) | 8 | 3 | 0.18 |
Duration of symptoms (months) | 10.5 ± 8.4 | 8.1 ± 9.2 | 0.55 |
Body mass index (kg/m2) | 23.8 ± 1.5 | 23.4 ± 1.3 | 0.62 |
Level | 0.11 | ||
T8–9 | 0 | 1 | |
T9–10 | 2 | 0 | |
T10–11 | 7 | 3 | |
T11–12 | 2 | 5 | |
Sato classification | 0.93 | ||
Lateral type | 3 | 3 | |
Extended type | 3 | 2 | |
Enlarged type | 4 | 2 | |
Fused type | 1 | 2 | |
Tuberous type | 0 | 0 | |
Dural adhesion | 3 | 2 | |
Dural ossification | 1 | 0 |