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Table 1 Demographic characteristics of two groups

From: In vivo wear performance of highly cross-linked polyethylene vs. yttria stabilized zirconia and alumina stabilized zirconia at a mean seven-year follow-up

  All PSZ ASZ P value
Number of Hips 91 23 68  
Gender (men/women) 8/83 2/21 6/62 >0.999
Age (years) 59 64 57 0.02
Body Mass Index (kg/m2) 23.4 24.1 23.2 0.32
Diagnosis     
  Osteoarthritis 75 16 58 0.21
  ION 10 5 6  
  Rheumatoid Arthritis 6 2 4  
Polyethylene Thickness (mm) 11 10.7 11.5 0.020
  1. ION idiopathic osteonecrosis of the hip.
  2. PSZ partially-stabilized zirconia.
  3. ASZ alumina stabilized zirconia.