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Table 3 Risk analysis between failure rates with T-score, body mass index, or combined.

From: Risk factor analysis for early femoral failure in metal-on-metal hip resurfacing arthroplasty: the effect of bone density and body mass index

Variable Threshold Failure Rate Percentage P-Value
T-score T ≥ 0 0/172 0% 0.003
  0 > T > -1.5 2/161 1.2%  
  T ≤ -1.5 3/40 8%  
Body mass index
(kg/m2)
< 29 1/234 0.4% 0.05
  ≥ 29 4/139 2.9%  
Combined T < -1.5 & BMI ≥ 29 3/12 25% < 0.001
  Others 2/361 0.6%