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Table 4 Linear regression preformed to determind predictors of poor changes preoperatively to the 2 years follow-up of the KOOS subscales pain.

From: A 2-year prospective study of patient-relevant outcomes in patients operated on for knee osteoarthritis with tibial osteotomy

 

Univeriate analysis

Multivariate analysisII

Predictor Variable

Na

Cb

(95% CI)

pc

R2 adjd

Cb

(95% CI)

pc

Age (year)

52

0.27

(-0.62–1.17)

0.54

0%

 

Not included

 

BMI (kg/m2)

48

0.62

(-0.89–2.12)

0.41

0%

 

Not included

 

Preop pain (0–100)

52

'-0.61

(-0.92–-0.29)

0.0003

21%

'-0.6

(-0.9–-0.2,8)

0.0004

Sex

52

1.42

(-10.77–13.6)

0.82

0%

 

Not included

 

0: female

26

       

1: male

26

       

Acceptable 2 year HKA-angle

42

8.78

(-12.81–30.38)

0.41

0%

 

Not included

 

0: no

7

       

1: yes

37

       

Smoker

52

'-0.35

(-15.27–14.56)

0.96

0%

 

Not included

 

0: no

40

       

1: yes

12

       

Complication

51

'-15.8

(-16.6–7.94)

0.06

0.5%

'-14.7

(-29.4–0.08)

0.05

0: no

43

       

1: yes

8

       
  1. aNumber of patients included
  2. bEstimated change of changes in preoperative until 2 years postoperative pain per unit change predictor variable; 95% confidence interval (CI) within paranthesis.
  3. c P value for effect of predictor variable.
  4. cFraction of changes of preopertive until 2 years postoperative pain variance explaind by each predictor (adjusted value).
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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