The article discusses the revised classification criteria for Sjögren’s syndrome (SS) developed by the American-European Consensus Group. The criteria were initially established by the European Study Group on Classification Criteria for SS between 1989 and 1996 and have been widely accepted. However, the group introduced modifications to improve the specificity and sensitivity of the criteria, particularly for diagnosing primary SS. The American-European group conducted a series of studies to validate and refine the criteria, using receiver operating characteristic (ROC) curve analysis and a classification tree method. The final criteria include specific diagnostic tests and exclusion criteria, such as the presence of anti-Ro/la antibodies and the absence of HCV infection. The group concluded that the modified criteria represent the best available tool for classifying SS patients and will be further validated in future studies.The article discusses the revised classification criteria for Sjögren’s syndrome (SS) developed by the American-European Consensus Group. The criteria were initially established by the European Study Group on Classification Criteria for SS between 1989 and 1996 and have been widely accepted. However, the group introduced modifications to improve the specificity and sensitivity of the criteria, particularly for diagnosing primary SS. The American-European group conducted a series of studies to validate and refine the criteria, using receiver operating characteristic (ROC) curve analysis and a classification tree method. The final criteria include specific diagnostic tests and exclusion criteria, such as the presence of anti-Ro/la antibodies and the absence of HCV infection. The group concluded that the modified criteria represent the best available tool for classifying SS patients and will be further validated in future studies.