Table 2 Characteristics of the patients with ASD
Item | ASD |
|---|---|
Number of patients | n = 34 |
Mean age (y) | 61.3 ± 11.4 |
Gender(M/F) | 19/15 |
Follow-up period (mo.) | 62.7 ± 15.1 |
Primary surgery segment | – |
L3–L4 | 5 |
L3–L5 | 6 |
L4–L5 | 5 |
L5–S1 | 18 |
ASD position (n) | – |
Cranial | 23 |
Caudal | 11 |
ASD segment (n) | – |
L2/3 | 1 |
L4/5 | 22 |
L5/S1 | 11 |