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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

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 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
  1. P-value (#1) displayed differences between groups 1 and 2, p-value (#2) between groups 2 and 3 and p-value (#3) between groups 1 and 3. ANOVA and post-hoc analysis according to Hochberg´s GT2 were used and level of significance set at p < 0.05, significant values were marked in bold. SD = standard deviation