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Table 4 Contribution of pre- and postoperative pelvic mobility based on ∆ PT = PTstanding-PTsitting defined as stiff (∆ PT < 10°), normal (∆ PT ≥ 10°-–3°), and hypermobile (∆ PT > 30°) 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

Pelvic mobility (∆ PT) Normal ≥ 18.5–24.9 kg/m2 Overweight ≥ 25.0–29.9 kg/m2 Obese ≥ 30–39.9 kg/m2
Classification of pre-and postoperative pelvic mobility according to the BMI
Stiff (%/N)
 Pre 25.0 (17) 27.2 (22) 12.2 (5)
 Post 7.4 (5) 9.9 (8) 7.5 (3)
Normal (%/N)
 Pre 60.3 (41) 56.8 (46) 78.0 (32)
 Post 69.1 (47) 64.2 (52) 72.5 (29)
Hypermobile (%/N)
 Pre 14.7 (10) 16.0 (13) 9.8 (4)
 Post 23.5 (16) 25.9 (21) 20 (8)
  1. % represents the percentage contribution; N represents the absolute number of patients; pre = preoperative; post = postoperative