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Table 3 Relation for clinical and radiographic parameters with VAS pain and HAQ: multivariate linear regression

From: Radiographic damage in early rheumatoid arthritis is associated with increased disability but not with pain—a 5-year follow-up study

Dependent variable

Independent variable

β

95% CI

p-value

r-square

VAS pain

  

Inclusion

  

0.24

 

Female

−2.68

−9.46–4.10

0.44

 
 

Age

−0.35

−0.56 to (−0.13)

<0.01

 
 

TJC28

1.18

0.70–1.66

<0.001

 
 

CRP

0.26

0.16–0.36

<0.001

 
 

Symptom duration

−0.68

−1.78–0.42

0.22

 
  

1 year after inclusion

0.24

 

Female

−2.04

−8.37–4.29

0.53

 
 

Age

−0.16

−0.36–0.03

0.10

 
 

TJC28

1.97

1.34–2.60

<0.001

 
 

ESR

0.28

0.13–0.42

<0.001

 
  

2 years after inclusion

  

0.29

 

Female

9.07

1.91–16.24

0.01

 
 

Age

−0.26

−0.49 to (−0.03)

0.03

 
 

TJC28

1.71

1.06–2.36

<0.001

 
 

ESR

0.40

0.20–0.59

<0.001

 
 

RF seropositivity

4.50

−2.62–11.62

0.21

 
 

ES

−0.03

−0.53–0.48

0.92

 
  

5 years after inclusion

  

0.24

 

Female

3.41

−3.62–10.45

0.34

 
 

Age

−0.01

−0.22–0.21

0.95

 
 

TJC28

1.75

1.11–2.39

<0.001

 
 

CRP

0.37

0.15–0.58

0.001

 

HAQ

  

Inclusion

  

0.39

 

Female

0.177

0.028–0.326

0.02

 
 

Age

0.001

−0.004–0.006

0.63

 
 

TJC28

0.039

0.028–0.050

<0.001

 
 

CRP

0.007

0.005–0.009

<0.001

 
 

ES

0.032

0.006–0.057

0.02

 
 

Symptom duration

−0.020

−0.044–0.005

0.11

 
  

2 years after inclusion

  

0.30

 

Female

0.222

0.049–0.395

0.01

 
 

Age

0.003

−0.002–0.009

0.22

 
 

TJC28

0.040

0.024–0.055

<0.001

 
 

ESR

0.010

0.006–0.015

<0.001

 
 

ES

0.010

−0.002–0.022

0.09

 
  

5 years after inclusion

  

0.28

 

Female

0.292

0.091–0.492

<0.01

 
 

Age

0.012

0.005–0.018

<0.001

 
 

TJC28

0.037

0.018–0.055

<0.001

 
 

ESR

0.003

−0.004–0.010

0.43

 
 

ES

0.009

0.001–0.017

0.02

 
  1. VAS visual analogue scale, CI confidence interval, RF rheumatoid factor, TJC28 tender joint count in 28 joints, CRP C-reactive protein, ESR erythrocyte sedimentation rate, ES erosion score, HAQ Health Assessment Questionnaire