Table 2 Spearman correlations of biomarkers with clinical variables

Age

−0.166; 0.428

−0.108; 0.608

−0.158; 0.450

−0.089; 0.671

BMI

0.625; 0.001

−0.066; 0.753

0.077; 0.715

0.011; 0.959

Sum K-L

0.453; 0.023

−0.0639; 0.762

0.076; 0.720

−0.072; 0.734

Sum OST

0.595; 0.002

0.320; 0.119

0.232; 0.264

0.417; 0.038

Sum JSN

0.182; 0.384

−0.174; 0.407

−0.104; 0.620

−0.114; 0.586

Sum Knee Synovitis

−0.026; 0.901

0.474; 0.017

0.126; 0.549

0.339; 0.098

Multi-Joint Synovitis

−0.284; 0.169

0.520; 0.008

−0.090; 0.670

0.344; 0.092

Sum PAS knee pain

0.048; 0.819

0.049; 0.818

0.165; 0.430

0.010; 0.961

Sum WOMAC knee pain (Q1)

−0.014; 0.947

0.132; 0.530

−0.007; 0.972

0.309; 0.134