Diagnostic variable | Spearman correlation coefficient | p Value |
Years since first symptoms | 0.045 | 0.770 |
Years since disease established | −0.088 | 0.558 |
IgM rheumatoid factor (IU/ml) | 0.440 | 0.007 |
Tender joint count | 0.084 | 0.574 |
Swollen joint count | 0.149 | 0.318 |
ESR4-150 (mm/1st h) | 0.396 | 0.006 |
DAS4-150 score | 0.250 | 0.094 |
↵4-150 ESR = erythrocyte sedimentation rate; DAS = disease activity score.