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Journal of Experimental Orthopaedics

Table 3 Uni- and multi-variable regression analysis of Harris 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 = 157)*

β

95% C.I.

p-value

β

95% C.I.

p-value

Preoperative data

 Age at index operation (yrs)

−0.40

(− 0.76 – –0.04)

0.030

−0.38

(− 0.74 – –0.02)

0.039

 Body Mass Index (BMI)

− 0.12

(− 0.59 – 0.35)

0.603

   

 Male sex

1.41

(−2.88 – 5.71)

0.517

   

Etiology

Primary arthrosis

REF

     

Secondary arthrosis

0.93

(−6.95 – 8.81)

0.816

   

Avascular necorsis

3.07

(−4.53 – 10.66)

0.427

   

Charnley grade

A

REF

  

REF

  

B

1.88

(−5.49 – 9.24)

0.615

1.25

(−6.03 – 8.53)

0.735

C

−4.89

(9.94 – 0.15)

0.057

−4.76

(−9.73 – 0.21)

0.061

Intraoperative data

 Stem size

−0.47

(−1.81 – 0.87)

0.491

   

 Cup size

− 0.01

(− 0.75 – 0.73)

0.976

   

Stem type

Standard - KA

REF

     

High offset - KHO

4.10

(−3.72 – 11.91)

0.302

   

Lateralized - KLA

1.84

(−2.52 – 6.20)

0.406

   

REF

−2.25

 

(−6.88 – 2.37)

0.338

   
  1. *Backward selection (p = 0.15) was used to identify variables to include in the multivariabla analysis
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