Table 5. Intraoperative Surgery Results.
| Total population (n = 252) | One-level operated subgroup(n = 210) | Two-level operated subgroup (n = 42) | |
|---|---|---|---|
| Surgery duration, mean ± SD (min) | 136.8 ± 50.4 | 127.7 ± 43.5 | 182.0 ± 58.3 |
| Fluoroscopy duration, mean ± SD (sec) | 122.0 ± 130.7 | 115.1 ± 123.9 | 154.1 ± 156.6 |
| Blood loss, mean ± SD (mL) | 175.8 ± 160.1 | 163.9 ± 139.7 | 233.1 ± 229.0 |
| Blood transfusion needed, n (%) | 1 (0.4) | 0 | 1 (2.4) |
| One level, % | 210 (83.3) | 210 (83.3) | |
| L2–L3 | 5 (2.0) | 5 (2.0) | |
| L3–L4 | 15 (6.0) | 15 (6.0) | |
| L4–L5 | 104 (41.3) | 104 (41.3) | |
| L5–S1 | 86 (34.1) | 86 (34.1) | |
| Two levels, % | 42 (16.7) | 42 (16.7) | |
| L3–L4 and L4–L5 | 11 (4.4) | 11 (4.4) | |
| L4–L5 and L5–S1 | 31 (12.3) | 31 (12.3) |