We studied usefulness of ARA criteria for the classification of sle in 108 outpatients with diagnosis established during long term follow-up. Sensitivity of ARA criteria was 96.3% and excluding tests for anti dsDNA and anti Sm antibodies was 93.5%. That means less than 10% false negative diagnoses. When at least 2 ARA criteria are present immunological tests of high specificity should confirm the diagnosis.
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