Peritoneal Dialysis-Associated Peritonitis Rates in the Outpatient and Hospital Setting Among Incident Dialysis Patients With Medicare, 2009–2018

Peritonitis is a leading cause of morbidity for peritoneal dialysis (PD) patients, with 10% to 20% of events leading to PD cessation.1,2 According to the United States Renal Data System (USRDS), rates of hospitalization for peritonitis have decreased by more than 50% in the US since 2009.3 However, other US studies reported a higher rate of peritonitis hospitalization than is reported by USRDS, raising the possibility that USRDS data on peritonitis as the primary cause of hospitalization may not accurately reflect the true burden of peritonitis.