Table 1.
Demography of patients
| Item | All patients | 1 year postoperatively | MRI evaluation | P | |||
|---|---|---|---|---|---|---|---|
| MMIA | TOPA | MMIA | TOPA | MMIA | TOPA | ||
| No. of patients | 41 | 50 | 25 | 30 | 11 | 10 | – |
| Gender (M/F) | 22/19 | 23/27 | 11/14 | 12/18 | 6/5 | 6/4 | NS |
| Mean age (years) | 53.5 | 53.4 | 51.2 | 52.4 | 52.4 | 50.8 | NS |
| Preoperative diagnosis (No. of patients) | NS | ||||||
| Lumbar disc herniation | 10 | 13 | 5 | 7 | 4 | 4 | – |
| Spinal stenosis | 7 | 8 | 4 | 3 | 2 | 2 | – |
| Posterior element distraction | 4 | 4 | 1 | 1 | 0 | 0 | – |
| Spondylolisthesis | 20 | 25 | 15 | 19 | 5 | 4 | – |
| Grade I | 9 | 13 | 5 | 7 | 3 | 2 | – |
| Grade II | 11 | 12 | 10 | 12 | 2 | 2 | – |
| Level of fusion (No. of patients) | NS | ||||||
| L3,4 | 2 | 3 | 0 | 1 | 0 | 0 | – |
| L4,5 | 25 | 32 | 16 | 19 | 8 | 7 | – |
| L5S1 | 14 | 15 | 9 | 10 | 3 | 3 | – |
NS, not significant.