Application of the 2022 ACR/EULAR criteria to Chinese patients with previously diagnosed eosinophilic granulomatosis with polyangiitis: The concordance rate between the 2022 ACR/EULAR criteria and the 1990 criteria for EGPA in China.

This study aimed to investigate the concordance rate between the 2022 American College of Rheumatology/European League Against Rheumatism (ACR/EULAR) criteria and the 1990 criteria for eosinophilic granulomatosis with polyangiitis (EGPA) in Chinese patients. 68 patients were diagnosed with EGPA according to the 1990 ACR criteria in the Department of Respiratory and Critical Care Medicine, Beijing Chao-yang Hospital Department, from May 2005 to December 2022, and those patients were reclassified using the 2022 ACR/EULAR criteria for EGPA. Among the 68 patients, 88.2% (60 cases) met the 2022 ACR/EULAR criteria for EGPA, and 11.8% (8 cases) patients failed to meet the new criteria. Only 66.2% of the patients were detected blood eosinophil count ≥ 1 × 109/L, while more patients (77.9%) met the item blood eosinophil count > 10% in the 1990 criteria. The report rate of nasal polyps was 13.2% in these patients. The concordance rate between the 2022 ACR/EULAR criteria and the 1990 criteria for EGPA was 88.2%. Compared with the 1990 criteria, the 2022 ACR/EULAR put more weighting on the blood eosinophil count and nasal polyps, while the diagnostic rate of them is low in Chinese patients. Thus improving the positive rate is important and routinely screening for nasal polyps should be performed in the future.