Objective: To validate the American College of Rheumatology Classification( ACR) Criteria( 2012) for the diagnosis of primary Sjgren's syndrome in Chinese patients. Methods: All patients involved in this study came from the Department of Oral Medicine Peking University Stomatology Hospital. They were devided into two groups of pSS and non-pSS according to the diagnoses made by two experts. Both groups of the patients had completed medical records kept in the hospital. Results: A total of 239 pSS patients( ...