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Table 4 Uni- and multi-variable regression analysis of Oxford Hip Score

From: Absence of instabilities and intra-prosthetic dislocations at 7 to 11 years following THA using a fourth-generation cementless dual mobility acetabular cup

Variable Univariable Multivariable (n = 163)*
β 95% C.I. p-value β 95% C.I. p-value
Preoperative data
 Age at index operation (yrs) 0.34 (0.16 – 0.51) < 0.001 0.36 (0.18 – 0.53) < 0.001
 Body Mass Index (BMI) −0.12 (−0.35 – 0.12) 0.325    
 Male sex −0.49 (−2.64 – 1.66) 0.653    
Etiology
Primary arthrosis REF      
Secondary arthrosis 0.47 (−3.37 – 4.32) 0.808    
Avascular necorsis −2.37 (−6.22 – 1.47) 0.225    
Charnley grade
A REF    REF   
B 2.56 (−0.93 – 6.05) 0.150 2.95 (− 0.39 – 6.30) 0.083
C 3.28 (0.82 – 5.74) 0.009 3.17 (0.81 – 5.52) 0.009
Intraoperative data
 Stem size 0.25 (−0.41 – 0.91) 0.458    
 Cup size 0.02 (−0.35 – 0.38) 0.922    
Stem type
Standard - KA REF      
High offset - KHO −0.46 (−4.44 – 3.52) 0.821    
Lateralized - KLA 0.25 (−1.93 – 2.43) 0.821    
Surgical Approach
Posterior REF    REF   
Watson-Jones −0.42 (−2.71 – 1.88) 0.721 −1.38 (−3.59 – 0.82) 0.216
  1. *Backward selection (p = 0.15) was used to identify variables to include in the multivariabla analysis