Fatigue in incident peritoneal dialysis and mortality: A real-world side-by-side study in Brazil and the United States

We tested if fatigue in incident Peritoneal Dialysis associated with an increased risk for mortality, independently from main confounders. We conducted a side-by-side study from two of incident PD patients in Brazil and the United States. We used the same code to independently analyze data in both countries during 2004 to 2011. We included data from adults who completed KDQOL-SF vitality subscale within 90 days after starting PD. Vitality score was categorized in four groups: >50 (high vitality), [greater than or equal to]40 to [less than or equal to]50 (moderate vitality), >35 to