Kaplan-Meier survival analyses of overall mortality. a Overall mortality in PD patients. b Overall mortality in categorized SP controlled duration groups. SP controlled duration was categorized into SP never controlled group, SP controlled <12 months group, 12–23 months group, 24–35 months group, and >35 months group. Data are shown with censored data. *p < 0.001, SP controlled 12–23 months group versus SP never controlled group; **p = 0.006, SP controlled 12–23 months group versus SP controlled <12 months group. PD, peritoneal dialysis; SP, serum phosphorus.