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Table 1 Proband, spouse, and sibling characteristics

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

Participants Number Sex (female/male ratio) Mean age (female/male [SD]) Mean BMI (female/male [SD])
THR probands 635 384/251 (1.5) 69.4 (9.2)/66.9 (11.4) 28.8 (6.3)/28.5 (3.6)*
TKR probands 486 344/142 (2.5) 69.8 (9.1)/71.1 (8.1) 30.3 (6.9)/28.5 (2.8)*
Spouses 787 290/497 (0.6) 67.2 (9.0)/69.6 (9.1) -
Siblings combined     
   THR proband siblings 1,533 775/758 (1.0) 67.1 (12.2)/66.1 (11.5) -
   TKR proband siblings 1,208 639/569 (1.1) 67.3 (11.2)/65.9 (26.5) -
   Spouse siblings 1,900 968/932 (1.0) 68.2 (11.4)/66.22 (11.17) -
Siblings with hip replacement     
   THR proband siblings 57 (3.7%) 30/27 (1.1) 72.4 (10.2)/72.2 (8.5) -
   TKR proband siblings 24 (1.9%) 15/9 (1.6) 72.2 (9.6)/74.5 (12.3) -
   Spouse siblings 24 (1.3%) 14/10 (1.4) 74.2 (9.07)/73.7 (9.47) -
Siblings with knee replacement     
   THR proband siblings 22 (1.4%) 9/13 (0.7) 76.55 (7.03)/73.69 (8.3) -
   TKR proband siblings 46 (3.8%) 27/19 (1.4) 72.7 (9.3)/72.3 (10.7) -
   Spouse siblings 25 (1.3%) 18/9 (2.0) 75.4 (8.5)/68.5 (10.7) -
Siblings with no replacement     
   THR proband siblings 1,454 730/724 (1.0) 67.7 (11.4)/66.3 (26) -
   TKR proband siblings 1,138 597/541 (1.1) 66.7 (11.4)/65.5 (26) -
   Spouse siblings 1,851 937/914 (1.0) 68.1 (11.4)/66.1 (11.2) -
  1. Demographic data for the THR probands and their siblings (THR proband siblings), the TKR probands and their siblings (TKR proband siblings), and the probands' spouses and the spouses' siblings (spouse siblings). Mean age and BMI values are provided separately for females and males, as are the standard deviations. *BMI was derived from 96 randomly chosen hip arthroplasty probands and 73 randomly chosen knee arthroplasty probands. BMI, body mass index; SD, standard deviation; THR, total hip replacement; TKR, total knee replacement.