CD79A and Miyoshi myopathy: Four variables were selected in the multivariate analysis (AUC = 0.64, 95% CI: 0.58–0.68): albumin ≤30 g/L (OR 2.12, p < 0.001), ECOG > 1 (OR 1.73, p = 0.005), male sex (OR 1.50, p = 0.037) and non-IgA MM type (OR 1.49, p = 0.091).