Surgical and operative results.
| Outcome Measure | Titanium | CFR-PEEK | P |
| Duration of operation, min, median (range) | 286 (94–726) | 270 (154–468) | 0.243b |
| Total length of stay, d, median (range) | 17 (5–62) | 10 (3–33) | 0.093b |
| Estimated blood loss, mL, median (range) | 500 (50–3500) | 275 (40–600) | 0.050b |
| No. of levels instrumented, median (range) | 5.00 (1.00–15.00) | 4.00 (2.00–7.00) | 0.007b |
| Cases where decompression was performed, n (%) | 32 (76.2) | 10 (50.0) | - |
| Number of levels decompressed, n (%) | 0.108a | ||
| 0 | 10 (23.8) | 10 (50.0) | |
| 1 | 9 (21.4) | 6 (30.0) | |
| 2 | 13 (31.0) | 2 (10.0) | |
| 3 | 7 (16.7) | 2 (10.0) | |
| 4 | 3 (7.1) | 0 (0) | |
| Number of levels decompressed, n (%) | 0.009 | ||
| <2 | 19 (45.2) | 16 (80.0) | |
| ≥2 | 23 (54.8) | 4 (20.0) | |
| Area of decompression, n (%) | - | ||
| Thoracic | 14 (33.3) | 6 (30.0) | |
| Thoracolumbar | 8 (19.0) | 1 (5.0) | |
| Lumbar | 6 (14.3) | 1 (5.0) | |
| Lumbosacral | 1 (2.4) | 1 (5.0) | |
| Sacral | 0 (0) | 0 (0) | |
| None | 13 (31.0) | 11 (55.0) | |
| Surgical complications, n (%) | 5 (22.7) | 3 (15) | - |
| Intraoperative incidental durotomy | 2 | 1 | |
| Delayed wound healing | 2 | 0 | |
| Superficial skin infection | 1 | 0 | |
| Deep surgical infection | 0 | 1 | |
| Hardware breakage (screw/rod) | 0 | 0 | |
| Screw loosening | 0 | 1 | |
| Medical complications, n (%) | 14 (33.3) | 2 (10.5) | 0.029a |
| Change in ASIA score, n (%) | 0.846a | ||
| Worsened | 0 (0) | 0 (0) | |
| No change | 8 (19.0) | 3 (15.0) | |
| Improved | 34 (81.0) | 17 (85.0) | |