Table 6 Contribution of pre- and postoperative spinal sagittal balance based on C7-SVA (balanced (≤ 50 mm) and imbalanced (> 50 mm)) and PI-LL Mismatch (balanced (≤ 10°) and imbalanced (> 10°) 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 | Overweight ≥ 25.0–29.9 kg/m2 | Obese ≥ 30–39.9 kg/m2 |
|---|---|---|---|
Classification of sagittal spinal balance according to the BMI | |||
C7-SVA (%/N) | |||
 Pre | |||
 Balance | 57.4 (39) | 46.9 (38) | 48.8 (20) |
  Imbalance | 42.6 (29) | 53.1 (43) | 51.2 (21) |
 Post | |||
  Balance | 55.9 (38) | 48.1 (39) | 41.5 (17) |
  Imbalance | 44.1 (30) | 51.9 (42) | 58.5 (24) |
PI-LL Mismatch (%/N) | |||
 Pre | |||
  Balance | 72.1 (49) | 74.1 (60) | 56.1 (23) |
  Imbalance | 27.9 (19) | 25.9 (21) | 43.9 (18) |
 Post | |||
  Balance | 80.9 (55) | 80.2 (65) | 56.1 (23) |
  Imbalance | 19.1 (13) | 19.8 (16) | 43.9 (18) |