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Table 1 Baseline Characteristics of all included patients

From: Synchronous or sequential cementless bilateral total hip arthroplasty for osseous ankylosed hips with ankylosing spondylitis

Variable Group A (22 hips) Group B (24 hips) T value P value
M/F 10/1 10/2 - -
Height (cm) 161.9 ± 9.0 160.0 ± 5.1 0.88 0.37
Weight (Kg) 59.9 ± 10.7 58.1 ± 6.6 0.69 0.50
BMI (Kg/m2) 22.7 ± 3.3 22.7 ± 2.5 -0.02 0.98
Friction couples
 Ceramic-on ceramic 18 18 - -
 Ceramic-on-polyethylene 4 6 - -
 Additional screws fixation (patients/hips) 5/10 6/12 - -
 Average follow-up time (months) 81.9 ± 36.3 79.9 ± 29.1 0.21 0.84
  1. Group A: synchronous cementless bilateral total hip arthroplasty
  2. Group B: sequential cementless bilateral total hip arthroplasty
  3. BMI body mass index