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

Table 3

Variables associated with devolvement of rheumatoid arthritis in univariable analysis.

Variable	Relative risk	95% CI	𝑃 value
Rheumatoid factor positive	3.96	1.85–8.46	0.0001
Anti-CCP antibodies positive	3.82	2.35–6.2	<0.0001
Score van der Helm-van Mil ≥8	4.8	2.3–10	<0.0001
DAS28 >5.1	1.01	0.65–1.6	0.9626
Symmetric involvement	0.99	0.67–1.45	0.9505
Male sex	0.73	0.35–1.52	0.3945
Older than 60 years	0.88	0.46–1.3	0.3739
Erythrosedimentation rate >40 mm	1.02	0.59–1.75	0.9382