Table 2.
Summary of results
| Parameters | One stage, n = 32 | Two stages, n = 25 | P value |
|---|---|---|---|
| Follow-up duration (years) | 4.6 ± 1.7 | 6.1 ± 2.2 | 0.006 |
| Mean operative time (minutes) | 156 ± 30 | 262. ± 62 | 0.001 |
| Mean blood loss (ml) | 794 ± 243 | 900 ± 256 | 0.116 |
| Incidence of complications | 4 (12.5%) | 12 (48%) | 0.003 |
| Complications | |||
| Donor site problems | 1 (3.1%) | 7 (28%) | - |
| Dural tear | 2 (6.3%) | 0 | |
| Anterior graft dislodgement (revision) | 0 | 2 (8%) | |
| Incisional hernia | 0 | 1 (4%) | |
| DVT | 0 | 1 (4%) | |
| Wound hematoma | 1 (3.1%) | 0 | |
| Paralytic ileus | 0 | 1 (4%) | |
| Hospital stay (days) | 2.6 ± 0.9 | 15.6 ±1.5 | 0.001 |
| Follow-up neurological function | |||
| Grade D | 4 (12.5%) | 5 (20%) | 0.485 |
| Grade E | 28 (87.5%) | 20 (80%) | |
| Mean neurological improvement | 1.58 ± 0.9 | 1.7 ± −0.58 | 0.665 |
| Follow-up back pain score (VAS) | 1.8 ± 1.1 | 1.8 ± 1 | 0.986 |
| Mean back pain improvement (VAS) | 6.63 | 6.64 | 0.347 |
| Return to work | |||
| Same work or activity level | 24 (75%) | 19 (76%) | 0.972 |
| Lighter work | 7 (21.9% | 5 (20%) | |
| Retired | 1 (3.1%) | 1 (4%) | |
| Post-operative kyphosis angle | 3.8° ± 3.4° | to 3.4° ± 6.4° | 0.469 |
| Follow-up kyphosis angle | 4.9° ± 1.5° | 4.2° ± 2.2° | 0.567 |
| Fusion rate | 100% | 100% | - |