Radiographic measurements before and after surgery for each anatomic level.
| Mean (SD) (Range) | ||||
| Measurement | L1/2 | L2/3 | L3/4 | L4/5 |
| Sagittal Cobb, ° | ||||
| Preoperative | −1.8 (5.6) (−11–13) | 2.5 (4) (−6-16) | 5.6 (4.9) (−5–21) | 9.5 (5.7) (1–21) |
| Postoperative | 2.2 (4.9) (−5–17) | 5.2 (3.8) (0–18) | 7.3 (4.4) (0–14) | 11 (4.8) (3–24) |
| ∆ | 4 (3.2) (0–11) | 2.7 (3.4) (−5–10) | 1.8 (4.2) (−10–14) | 1.6 (4.6) (−7–17) |
| Coronal Cobb, ° | ||||
| Preoperative | 5.5 (5.1) (0–16) | 7.4 (5.8) (0–26) | 5.8 (5.6) (0–23) | 4.2 (3.8) (0–15) |
| Postoperative | 4.2 (3.5) (0–11) | 3.4 (3.8) (0–17) | 3.3 (4) (0−20) | 2.7 (2.2) (0–9) |
| ∆ | −1.3 (6) (−14−11) | −4 (4.6) (−14–6) | −2.4 (5.5) (−22–18) | 4.4 (2.5) (−1–11) |
| Foraminal height, mm | ||||
| Preoperative | 15.2 (3.8) (11–23) | 16.5 (4) (8−26) | 15.7 (3.8) (8–24) | 15.5 (3.6) (6–24) |
| Postoperative | 18 (5.1) (11–30) | 19.6 (4.4) (9–37) | 19.3 (4) (8-32) | 18.6 (3.5) (9–25) |
| ∆ | 2.8 (2.6) (−1–7) | 3.1 (3.2) (−2–16) | 3.6 (3.5) (−3–14) | 2.7 (4.7) (−16–13) |
| Foraminal width, mm | ||||
| Preoperative | 7.1 (2) (3-10) | 8 (2) (5−13) | 8.3 (1.6) (5–12) | 8.5 (1.9) (5–14) |
| Postoperative | 9.5 (3) (6−15) | 9.4 (2.1) (5–14) | 9.8 (1.9) (7–14) | 9.8 (1.9) (6–13) |
| ∆ | 2.4 (2.7) (−1–7) | 1.4 (2.2) (−2–8) | 1.4 (2.4) (−5–7) | 1 (2.5) (−6–7) |
| Disc space height, mm | ||||
| Preoperative | 4 (3) (1−11) | 5 (2.6) (1–11) | 5.8 (2.9) (1–12) | 6.5 (3) (2−13) |
| Postoperative | 9.2 (2.2) (7–16) | 9.8 (2) (7−15) | 10.6 (1.5) (8–14) | 10.9 (1.7) (8–16) |
| ∆ | 5.2 (2.3) (−1–9) | 4.8 (2.5) (−1–10) | 4.7 (2.9) (0–11) | 4.4 (2.5) (−1–11) |