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Table 5 Correlation between the indexes of ultrasonic grading and clinical and laboratory parameters

From: Comparison of the clinical effectiveness of US grading scoring system vs MRI in the diagnosis of early rheumatoid arthritis (RA)

Clinical and laboratory parameters

r (GSUS)

r (PDUS)

r (bone erosion)

Duration of disease

0.09

0.16

0.40*

DAS28

0.13

0.39*

− 0.15

CRP

0.31*

0.39*

0.16

ESR

0.13

0.41*

− 0.05

RF

0.30*

0.12

0.35*

CCP

0.18

0.29*

0.37*

  1. *P < 0.05, statistically significant