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Table 1 Demographics and diagnoses

From: Cup orientation following posterior approach THA – the effect of different visual aids and pelvic supports

  Number of Hips Mechanical alignment guide Inclinometer p-value Stulberg positioner Capello positioner p-value
Demographics
 Number of hips 150 50 50 50 50
 Gender (m: f) 62: 88 19: 31 23: 27 0.42 23: 27 20: 30 0.55
 Age at surgery in years (mean, SD) 61 (15) 59 (13) 59 (18) 0.76 59 (18) 65 (13) 0.07
 BMI in kg/m2 (mean, SD) 31 (6) 28 (5) 30 (6) 0.14 30 (6) 32 (6) 0.13
 Fat thickness in cm (mean, SD) 7 (3) 7 (2) 7 (3) 0.99 7 (3) 7 (2) 0.99
Diagnosis
 Primary osteoarthritis 113 41 39 41 46
 Secondary osteoarthritis due to
  Developmental dysplasia 19 5 4 5 2
  Avascular necrosis 6 1 2 2 1
  Other (e.g fracture, Perthe’s, failed ORIF) 12 3 5 2 1
Acetabular Implants
 CSF (JRI, London UK) 64
 Trident (Stryker Orthopaedics, Mahwah, NJ, USA) 11
 G7 (Zimmer Biomet, Warsaw, IN, USA) 75