Overall survival and renal survival according to low-dFLC response in patients of the low-dFLC cohort and a baseline value of dFLC <20 mg/L. (A) Overall survival according to low-dFLC response, 3-month landmark analysis (N = 69, P = .049). In patients who obtained a low-dFLC response, median survival was not reached. In patients who did not obtain a low-dFLC response, median survival was 118 months. (B) Renal survival according to low-dFLC response, 3-month landmark analysis (N = 68, P = .036). In patients who obtained a low-dFLC response, renal survival at 3 years was 100%. In patients who did not obtain a low-dFLC response, renal survival at 3 years was 73%. (C) Overall survival according to the criteria of low-dFLC response, 6-month landmark analysis (N = 97, P = .008). In patients who obtained a low-dFLC response, median survival was not reached. In patients who did not obtain a low-dFLC response, median survival was 118 months. (D) Renal survival according to low-dFLC response, 6-month landmark analysis (N = 94, P = .025). In patients who obtained a low-dFLC response, renal survival at 3 years was 96%. In patients who did not obtain a low-dFLC response, renal survival at 3 years was 74%.