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Table 5 Determinants of WOMAC scores and HHS; multiple linear regression analysis

From: Quality of life and functionality after total hip arthroplasty: a long-term follow-up study

   

Outcome

  

Explanatory variable

c

95% CI

P

Total adjusted R2 %*

R2 Change %**

   

HHS

  

Age

-1.22

-1.77 -- -0.68

< 0.001

 

15

Postoperative employment

12.70

8.24 -- 17.16

< 0.001

35

11

FCI score

- 1.85

-2.92 -- -0.78

0.001

 

5

 

Total WOMAC

Postoperative employment

-14.89

-19.51 -- -10.27

< 0.001

 

13

FCI score

2.36

1.19 -- 3.52

< 0.001

30

10

Age

1.20

0.66 -- 1.75

< 0.001

 

4

Age at operation

-0.90

-1.43 -- -0.36

0.001

 

3

 

WOMAC function

FCI score

2.35

1.43 -- 3.28

< 0.001

 

13

Postoperative employment

-12.22

-15.90 -- -8.53

< 0.001

32

13

Age

0.92

0.49 -- 1.36

< 0.001

 

3

Age at operation

-0.71

-1.14 ---0.28

0.001

 

3

 

WOMAC stiffness

Postoperative employment

-0.70

-1.18 -- -0.22

0.004

5

3

 

WOMAC pain

Age

0.22

0.10 -- 0.33

< 0.001

 

8

Postoperative employment

-1.94

-2.90 -- -0.97

< 0.001

19

6

Age at operation

-0.14

-0.26 -- -0.03

0.017

 

3

  1. C = coefficient; CI = confidence interval; FCI = Functional Comorbidity Index
  2. * = total adjusted R2 accounted for by the whole model
  3. ** = only explanatory variables accounting for a R2 variation in the outcome ≥ 3 are reported