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Aim:  To analyse the performance of existing diagnosis/classification criteria for Behcet's disease (BD) in Iranian patients. There are 13 sets: Curth (1946), Hewitt (1969), Mason and Barnes (1969), Hewitt revised (1971), Japan (1972), Hubault and Hamza (1974), O'Duffy (1974), Cheng and Zhang (1980), Dilsen (1986), Japan revised (1988), International (1990), Iran (1993), Classification Tree (1993), and Dilsen revised criteria (2000).

Methods:  All patients from the Behcet's Disease Registry (5666) and control patients (2406) entered the study. Sensitivity, specificity and accuracy were calculated.

Results:  The most sensitive was Curth criteria with (99.7%), followed by Classification Tree (97.3%), Zhang (93.5%), Iran (91.4%), Japan revised (86.4%), Japan (85.3%), Dilsen (83.7%), Hubault and Hamza (81.6%), Dilsen revised (81.2%), International criteria (79.8%), Hewitt (73.8%), O'Duffy (70.7%), and Masson and …