IL31RA and autoimmune disease: Multivariate logistic regression revealed that age (odds ratio [OR]: 1.032; 95% CI: 1.005-1.060), presence of autoimmune disease (OR: 4.884; 95% CI: 1.038-22.971), and serum MAC-GPL IgA antibody level (OR: 1.325; 95% CI: 1.144-1.536) were independent predictors of MAC-LD (Table 2).