Table 4 Spearman correlation (ρ) between baseline continuous and categorical variables

14-3-3η

1

14-3-3η ≥ 0.19

0.865 ***

1

14-3-3η ≥ 0.50

0.833 ***

0.808 ***

1

Anti-CCP2

0.529 ***

0.515 ***

0.530 ***

1

Anti-CCP2-positive

0.529 ***

0.524 ***

0.539 ***

0.849 ***

1

RF

0.716 ***

0.659 ***

0.731 ***

0.624 ***

0.638 ***

1

RF positive

0.669 ***

0.616 ***

0.679 ***

0.616 ***

0.661 ***

0.927 ***

1

Anti-Sa positive

0.409 ***

0.413 ***

0.437 ***

0.527 ***

0.519 ***

0.500 ***

0.481 ***

Age (years)

-0.140 *

-0.118 *

-0.087

-0.033

-0.085

-0.069

-0.104

1

Age ≥65 years

-0.151 **

-0.131 *

-0.103

-0.040

-0.095

-0.071

-0.099

0.836 ***

1

BMI ≥30

-0.028

0.042

0.007

-0.031

-0.013

-0.014

-0.039

-0.06

-0.024

1

Gender (women vs men)

-0.031

-0.034

-0.074

-0.010

-0.033

-0.044

-0.030

-0.158 **

-0.072

0.000

Symptom duration (months)

0.119 *

0.127 *

0.122 *

0.144

0.164

0.146

0.141

-0.067

-0.032

-0.002

Current smoker

0.137 *

0.075

0.110 *

-0.022

0.005

0.091

0.112

-0.221 ***

-0.206 ***

-0.068

M-HAQ

0.024

0.009

0.000

-0.030

-0.064

-0.024

-0.053

0.112 *

0.032

0.138 *

DAS28-CRP

0.061

0.052

0.077

0.023

-0.009

0.064

0.013

0.135 **

0.101

0.048

SDAI

0.041

0.033

0.067

0.009

-0.024

0.050

-0.006

0.112 **

0.089

0.02

Pain

0.012

-0.004

-0.011

0.029

0.003

0.051

0.043

0.011

0.014

0.124 *

ESR

0.044

0.059

0.076

0.035

0.007

0.089

0.067

0.267 ***

0.196 ***

0.115 *

CRP

0.000

-0.011

0.023

0.014

0.021

0.015

-0.009

0.151 **

0.091

0.091

CRP >8

-0.02

-0.021

0.008

0.002

0.008

-0.015

-0.029

0.091

0.048

0.028

SJC28

0.019

0.010

0.055

-0.019

-0.059

0.036

0.000

0.094

0.084

-0.043

TJC28

0.082

0.080

0.103

0.008

-0.022

0.065

0.005

0.124 *

0.102

0.009

Total SvH score

0.036

0.051

0.049

0.009

0.024

0.026

-0.005

0.491 ***

0.391 ***

0.013

SvH erosion score

0.04

0.035

0.052

0.021

0.049

0.050

0.022

0.360 ***

0.287 ***

0.02