IFNA1 and systemic lupus erythematosus: Among SLE patients of European ancestry, IFN‐Score‐A and IFN‐Score‐B were both positively correlated with overall disease activity, with a stronger relationship for SLEDAI‐2K (for IFN‐Score‐A, R2 = 0.366, P < 0.000; for IFN‐Score‐B, R2 = 0.333, P < 0.000) than numerical BILAG (for IFN‐Score‐A, R2 = 0.282, P = 0.002; for IFN‐Score‐B, R2 = 0.224, P = 0.013).