Table 5 Analysis of sagittal alignment parameter C7-central vertical axis and PI-LL mismatch preoperative (Pre) and postoperative (Post) according to the BMI: group 1: ≥ 18.5–24.9 kg/m2, group 2: ≥ 25.0–29.9 kg/m2 and group 3: ≥ 30–39.9 kg/m2
BMI groups | Normal ≥ 18.5–24.9 kg/m2 mean (± SD) | Overweight ≥ 25.0–29.9 kg/m2 mean (± SD) | Obese ≥ 30–39.9 kg/m2 mean (± SD) | p-value (#1) | p-value (#2) | p-value (#3) |
|---|---|---|---|---|---|---|
Spinal sagittal alignment according to the BMI | ||||||
C7-SVA Pre (mm) | 42.6 (38.1) | 54.8 (36.1) | 68.6 (42.7) | .155 | .174 | .002 |
C7-SVA post (mm) | 45.4 (33.0) | 56.2 (31.9) | 65.4 (39.1) | .155 | .403 | .010 |
PI-LL mismatch pre (°) | 1.2 (12.5) | 3.5 (11.7) | 7.7 (14.7) | .597 | .251 | .032 |
PI-LL mismatch post (°) |  − 0.3 (12.6) | 0.9 (11.6) | 5.4 (13.4) | .902 | .168 | 0.058 |