Table 1 Patient characteristics
Characteristic | Value |
|---|---|
Mean age (years) | 62.7 ± 11.6 |
Number | 55 |
Male:Female | 17:38 |
Two patients lost to follow up | |
 Follow-up period in months | 6-50 |
 Mean follow-up period in months | 24 |
Level treated | |
 L4/5 | 36 |
 L5/S1 | 16 |
 L3/4 | 3 |
Diagnosis | |
 Degenerative spondylolisthesis | 33 |
 Isthmic lumbar spondylolisthesis | 9 |
Grade II slip 33/42 (78.6%) | |
 Foraminal stenosis | 9 |
 Discogenic pain | 2 |
 Lateral disc herniation plus spinal stenosis | 2 |