BACKGROUND: Common outcomes of peritoneal dialysis (PD)-related peritonitis include catheter removal and transition to hemodialysis (HD). According to recent data, the incidence of PD-related peritonitis in Japan is not low, and peritonitis is the most common cause of withdrawal from PD. Against this backdrop, the purpose of this study is to determine the incidence of PD-related peritonitis at the Outpatient Nephrology Clinic of Tokai University Hospital (hereafter "the Clinic") and to examine causative bacteria and the risk factors related to the development of peritonitis. METHODS: We investigated all PD-related peritonitis episodes of 192 PD patients who visited the Clinic during the period from April 1, 2001 to March 31, 2011 and established the incidence of PD-related peritonitis, along with culture-negative peritonitis rates. Regarding the risk factors that are associated with the development of peritonitis, we examined patient backgrounds, whether an automated peritoneal dialysis (APD) device was used, and which type of connection system was employed. RESULTS: The incidence of peritonitis was one episode per 64.5 patient-months, and the culture-negative peritonitis rate was 16.4 %. Of the cultured bacterial isolates 71.3 % were Gram-positive cocci, including 25.0 % of coagulase-negative staphylococci, 13.2 % of methicillin-susceptible Staphylococcus aureus (MSSA), and 6.6 % of methicillin-resistant Staphylococcus aureus (MRSA). Gram-negative rods were 19.1 %. Risk factors associated with the development of peritonitis included age at the start of PD [odds ratio 1.042, 95 % confidence interval (CI) 1.016-1.069, p value = 0.001], diabetes mellitus nephropathy (DMN) (odds ratio 22.003, 95 % CI 2.101-230.452, p value = 0.010), and the use of a sterile tubing welder device (STWD) (odds ratio 2.399, 95 % CI 1.043-5.521, p value = 0.040). CONCLUSIONS: Regarding the situation of peritonitis at a single center during the 10-year period of this study, risk factors associated with the development of peritonitis included age at the start of PD, DMN, and the use of an STWD.
BACKGROUND: Common outcomes of peritoneal dialysis (PD)-related peritonitis include catheter removal and transition to hemodialysis (HD). According to recent data, the incidence of PD-related peritonitis in Japan is not low, and peritonitis is the most common cause of withdrawal from PD. Against this backdrop, the purpose of this study is to determine the incidence of PD-related peritonitis at the Outpatient Nephrology Clinic of Tokai University Hospital (hereafter "the Clinic") and to examine causative bacteria and the risk factors related to the development of peritonitis. METHODS: We investigated all PD-related peritonitis episodes of 192 PDpatients who visited the Clinic during the period from April 1, 2001 to March 31, 2011 and established the incidence of PD-related peritonitis, along with culture-negative peritonitis rates. Regarding the risk factors that are associated with the development of peritonitis, we examined patient backgrounds, whether an automated peritoneal dialysis (APD) device was used, and which type of connection system was employed. RESULTS: The incidence of peritonitis was one episode per 64.5 patient-months, and the culture-negative peritonitis rate was 16.4 %. Of the cultured bacterial isolates 71.3 % were Gram-positive cocci, including 25.0 % of coagulase-negative staphylococci, 13.2 % of methicillin-susceptible Staphylococcus aureus (MSSA), and 6.6 % of methicillin-resistant Staphylococcus aureus (MRSA). Gram-negative rods were 19.1 %. Risk factors associated with the development of peritonitis included age at the start of PD [odds ratio 1.042, 95 % confidence interval (CI) 1.016-1.069, p value = 0.001], diabetes mellitus nephropathy (DMN) (odds ratio 22.003, 95 % CI 2.101-230.452, p value = 0.010), and the use of a sterile tubing welder device (STWD) (odds ratio 2.399, 95 % CI 1.043-5.521, p value = 0.040). CONCLUSIONS: Regarding the situation of peritonitis at a single center during the 10-year period of this study, risk factors associated with the development of peritonitis included age at the start of PD, DMN, and the use of an STWD.
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