International Journal of Rheumatology / 2013 / Article / Tab 4

Clinical Study

Validation of a Prediction Rule for the Diagnosis of Rheumatoid Arthritis in Patients with Recent Onset Undifferentiated Arthritis

Table 4

Logistic regression including van der Helm-van Mil score as a dichotomous variable.

VariableOdds ratio95% CI value

Symmetric involvement0.710.2–2.20.564
Disease duration (months)0.990.9–1.10.934
vHvM score >817.994.5–71.9<0.0001

ESR: erythrosedimentation rate; HAQ: Health Assessment Questionnaire; vHvM score >8: van der Helm-van Mil score equal or greater than 8; DAS28: disease activity score for 28 joints.