MUC1 and interstitial lung disease: The risk factors of AAV-ILD within age, KL-6, and ESR in cross-sectional studies were (WMDs = 4.28, 95 % CI: 1.06‒7.50), (WMDs = 256.08, 95 % CI: 158.14‒354.02), and (WMDs = 12.00, 95 % CI: 2.32‒21.68), respectively (Table 3, Table 4, Table 5, Table 6), (Supplement F).