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%