Hospitalization among United States dialysis patients: hemodialysis versus peritoneal dialysis

G Habach, W E Bloembergen, E A Mauger, R A Wolfe, F K Port
Journal of the American Society of Nephrology: JASN 1995, 5 (11): 1940-8
Measurements of hospitalization in the dialysis population are important because they provide insight into the morbidity and the cost of treatment among dialysis patients. Prior comparisons of hospitalization for different dialysis modalities have had conflicting results. This study was designed to compare hospitalization for patients treated with peritoneal dialysis (PD) versus hemodialysis (HD) using the data from the U.S. Renal Data System 1993 Annual Data Report. The study population included all Medicare dialysis patients prevalent on January 1, 1988 through 1990. Patients were monitored to transplantation, death, or end of the calendar year for a total of 189,654 patient years. Hospital admission rates were computed from the total number of hospital admissions during the year divided by the total number of patient years at risk. Patients were classified by treatment modality (PD, HD), cause of ESRD (diabetes as a cause of ESRD versus all other causes), age (0 to 19, 20 to 44, 45 to 65, +65), and race (black, white). Rate ratios (RR:PD/HD) for hospital admissions per year at risk were estimated, while adjusting for the other factors with Poison regression. On average, hospital admission rates per patient year at risk for dialysis patients treated with PD were 14% higher than for those treated with HD (RR = 1.14; 95% confidence interval (Cl), 1.13 to 1.15) when adjusting for race, age, gender, and cause of ESRD. The excess in the overall adjusted admission rates in PD patients compared with HD patients was higher for black than for white patients (RR:PD/HD = 1.22 versus RR = 1.11; 95% Cl, 1.10 to 1.13).(ABSTRACT TRUNCATED AT 250 WORDS)

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