In multivariate analysis, thrombocytopenia (HR: 2.81, 95% CI, 1.6-5, P < 0.001), low serum albumin (HR: 2.49, 95% CI, 1.44-4.3, P = 0.001) and a PFS >12 months at index anti-CD38 therapy (HR: 0.367, 95% CI, 0.181-0.745, P = 0.006) were the only independent prognostic factors for OS. Here, ALB is linked to Thrombocytopenia.