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Table 4 The prevalence of arthroplasty in THR proband siblings stratified by unilateral versus bilateral replacement

From: Hip joint replacement surgery for idiopathic osteoarthritis aggregates in families

Probands (n = 635; mean age in females/males, years [SD]) THR proband siblings (n = 1533)
  UHR BHR Unaffected Total
UHR (n = 463; 69.3 [9]/67.2 [11.3]) 18 (1.6%) 15 (1.3%) 1,079 (96.1%) 1,122
BHR (n = 172; 69.7 [9.4]/65.9 [11.3]) 17 (4.1%) 7 (1.7%) 375 (91.1%) 411
Total 35 22 1,454 1,533
  1. χ2 (3 degrees of freedom) = 23.6; P < 0.001. BHR, bilateral hip replacement; SD, standard deviation; THR, hip replacement; UHR, unilateral hip replacement.