Table 2 Correlations between lymph node indices and patient characteristics at baseline

 IgG ACPA (U/ml)^a

−0.07 (−0.38 to 0.25)

p = 0.677

−0.16 (−0.45 to 0.16)

p = 0.321

−0.04 (−0.35 to 0.27)

p = 0.790

 (ACPA-positive patients)

0.04 (−0.41 to 0.47)

p = 0.874

−0.20 (−0.59 to 0.27)

p = 0.402

−0.12 (−0.54 to 0.34)

p = 0.605

 IgM RF (U/ml)

−0.01 (−0.33 to 0.30)

p = 0.936

0.05 (−0.27 to 0.36)

p = 0.752

0.09 (−0.23 to 0.40)

p = 0.568

 (RF-positive patients)

0.08 (−0.40 to 0.52)

p = 0.760

0.20 (−0.29 to 0.61)

p = 0.414

0.23 (−0.27 to 0.63)

p = 0.361

 TJC28

0.01 (−0.30 to 0.33)

p = 0.945

0.01 (−0.30 to 0.33)

p = 0.929

−0.02 (−0.33 to 0.30)

p = 0.910

 TJC (ipsilateral)^{b, c}

−0.02 (−0.34 to 0.29)

p = 0.876

0.00 (−0.32 to 0.31)

p = 0.994

−0.07 (−0.38 to 0.25)

p = 0.656

 SJC28

0.14 (−0.18 to 0.44)

p = 0.394

0.24 (−0.08 to 0.52)

p = 0.142

0.24 (−0.08 to 0.51)

p = 0.147

 SJC (ipsilateral)^{b, c}

0.15 (−0.17 to 0.44)

p = 0.366

0.25 (−0.07 to 0.53)

p = 0.121

0.21 (−0.11 to 0.50)

p = 0.189

 12-joint GS index

0.30 (−0.02 to 0.56)

p = 0.063

0.33 (0.02–0.59)

p  = 0.039

0.36 (0.05–0.60)

p  = 0.026

 GS index (ipsilateral)^b

0.15 (−0.17 to 0.45)

p = 0.347

0.39 (0.08–0.62)

p  = 0.015

0.25 (−0.06 to 0.53)

p = 0.117

 GS index (contralateral)

0.05 (−0.27 to 0.36)

p = 0.767

0.21 (−0.11 to 0.49)

p = 0.204

0.14 (−0.18 to 0.44)

p = 0.392

 12-joint PD index

0.46 (0.17–0.68)

p  = 0.003

0.31 (0.00–0.57)

p = 0.053

0.35 (0.04–0.60)

p  = 0.029

 PD index (ipsilateral)^b

0.40 (0.10–0.64)

p  = 0.011

0.42 (0.12–0.65)

p  = 0.007

0.36 (0.05–0.61)

p  = 0.024

 PD index (contralateral)

0.16 (−0.17 to 0.45)

p = 0.340

0.16 (−0.17 to 0.45)

p = 0.342

0.19 (−0.13 to 0.48)

p = 0.235