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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

From: Does obesity affect acetabular cup position, spinopelvic function and sagittal spinal alignment? A prospective investigation with standing and sitting assessment of primary hip arthroplasty patients

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)
  1. % represents the percentage contribution; N represents the absolute number of patients; pre = preoperative; post = postoperative