The International Study Group (ISG) criteria and International Criteria for Behcet's Disease (ICBD) are the two main sets of criteria used to diagnose Behcet's Disease. The ISG criteria were developed in 1990 based on data from 7 countries but had low sensitivity in validation studies. The ICBD criteria were developed in 2010 based on data from 27 countries. When evaluated on 3294 patients with Behcet's Disease and 2581 controls from 2000-2016, the ICBD criteria had higher sensitivity (97.4% vs 66.7%), specificity (97.5% vs 99.7%), and accuracy (97.4% vs 81.3%) compared to the ISG criteria