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Table 2 Clinical outcomes of all included patients preoperatively and postoperatively

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
Preoperative hip contracture (°) 39.3 ± 20.3 37.7 ± 18.7 0.28 0.40
Preoperative HHS 30.5 ± 5.9 31.4 ± 4.6 -0.62 0.58
Postoperative HHS 84.0 ± 2.8 83.4 ± 2.0 0.89 0.38
Postoperative extension (°) 0.73 ± 2.4 0.54 ± 1.9 0.29 0.77
Postoperative flexion (°) 86.5 ± 4.4 85.7 ± 3.5 0.67 0.50
Postoperative ROM (°) 85.7 ± 4.5 85.1 ± 4.1 0.47 0.64
Time of walking for the first time postoperatively 5.1 ± 2.6 3.6 ± 1.2 2.43 0.02*
average blood transfusions (U) 3 ± 3.97 0.71 ± 1.99 2.29 0.028*
blood transfusion rate 8/11(72.7 %) 5/24 (20.8 %) - -
  1. Group A: synchronous cementless bilateral total hip arthroplasty
  2. Group B: sequential cementless bilateral total hip arthroplasty
  3. ROM range of motion
  4. HHS Harris Hip score
  5. P values with statistical significance are marked with *