Table 2 

Summary of the full and reduced multivariable logistic regression model. 

Variables 
Degree of Freedom 
Type* 
P value 


Full model including all of the following variables (P = 0.04) 



Femoral fixation type 
1 
C 
0.7 


Femoral Component Size 
1 
N 
0.5 


Primary DX 
1 
C 
0.95 


Sex 
1 
C 
0.27 


Age 
1 
N 
0.67 


Tscore 
2** 
C 
0.002 


BMI 
1 
N 
0.02 


Reduced model only including significant variables (P = 0.002) 



Tscore 
2** 
C 
0.002 


BMI 
1 
N 
0.02 


* C = Category; N = Numerical ** Grouped with T≥0, 0 > T > 1.5, and T≤ 1.5 

Gross and Liu Journal of Orthopaedic Surgery and Research 2012 7:1 doi:10.1186/1749799X71 