Table 2 Correlations between serum CLU levels, clinical and laboratory parameters

AUSCAN

r = -0.087

r = -0.151

r = 0.100

p = 0.318

p = 0.179

p = 0.470

AUSCAN - pain

r = -0.166

r = -0.275

r = 0.071

p = 0.054

p = 0.013

p = 0.610

AUSCAN - stiffness

r = -0.107

r = -0.124

r = -0.097

p = 0.218

p = 0.271

p = 0.487

AUSCAN - function

r = -0.009

r = -0.066

r = 0.144

p = 0.914

p = 0.558

p = 0.299

Algofunctional index

r = -0.139

r = -0.151

r = -0.075

p = 0.107

p = 0.179

p = 0.590

VAS – pain , mm

r = -0.084

r = -0.220

r = 0.201

p = 0.331

p = 0.049

p = 0.145

CRP, mg/l

r = 0.037

r = -0.004

r = 0.117

p = 0.674

p = 0.969

p = 0.401

Disease duration, years

r = -0.032

r = -0.024

r = -0.011

p = 0.713

p = 0.832

p = 0.938

US osteophytes, n

r = 0.156

r = 0.189

r = 0.214

p = 0.072

p = 0.091

p = 0.120

GS synovitis (total)

r = 0.007

r = 0.042

r = 0.130

p = 0.937

p = 0.711

p = 0.349

GS synovitis (joint count)

r = 0.001

r = 0.023

r = 0.133

p = 0.990

p = 0.840

p = 0.339

PD synovitis (total)

r = 0.083

r = 0.111

r = 0.217

p = 0.341

p = 0.324

p = 0.114

PD synovitis (joint count)

r = 0.079

r = 0.097

r = 0.236

p = 0.362

p = 0.389

p = 0.085