Table 3

Linear regression analysis of carotid intima-media thickness, rheumatoid arthritis features and cardiovascular risk factors in recent-onset rheumatoid arthritis patients

Variable

R2 value

Standardized β coefficient

Standard error

t value

P value

Confidence interval


Univariate model

Number of swollen joints

0.12

0.391

0.041

2.25

0.032

0.008–0.174

Disease activity score (DAS4v)a

0.16

0.431

0.079

2.74

0.01

0.056–0.377

C-reactive protein level (mg/l)a

0.14

0.407

0.025

2.71

0.01

0.018–0.121

Rheumatoid factor presenceb

0.047

0.54

0.072–0.117

Age at onset of rheumatoid arthritisa

0.56

0.759

0.001

7.19

<0.001

0.008–0.014

Male sexb

0.066

0.018

-0.298 to -0.030

Pack-year history

0.10

0.320

0.001

2.09

0.044

0.000–0.005

History of smoking, everb

0.062

0.002

-0.329 to -0.079

Systolic blood pressurea

0.27

0.540

0.184

3.63

<0.001

0.292–1.040

Cholesterol level

0.01

0.146

0.197

0.82

0.417

-0.564 to -0.239

Multivariate model

Age at onset of rheumatoid arthritis

0.64

0.002

6.11

<0.001

0.007–0.012

C-reactive protein level (mg/l)

0.001

2.18

0.038

0.000–0.004


Adjusted R2 of the multivariate linear regression model = 0.69. aVariables entered into the multivariate model. Parameters determined by univariate linear regression analysis or t testb.

Hannawi et al. Arthritis Research & Therapy 2007 9:R116   doi:10.1186/ar2323

Open Data