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

Table 2

Diagnosis fulfilled by patients with early arthritis after followup.

Diagnosis	Number of patients	%
Rheumatoid arthritis	37	40.7
Undifferentiated arthritis	28	30.8
Polymyalgia rheumatica	4	4.40
Psoriatic arthritis	4	4.40
Osteoarthritis	3	5.26
Sjogren’s Syndrome	2	2.20
Sarcoidosis	1	1.10
Other	12	13.18
Total	91	100