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Clinical |
School of Medicine, Chang Gung University, Taoyuan, Taiwan; Division of Nephrology, Chang Gung Memorial Hospital, Keelung, Taiwan
Correspondence to: M.S. Wu, Division of Nephrology, Chang Gung Memorial Hospital, 222, Mai-Chin Road, Keelung, Taiwan. maxwu1{at}adm.cgmh.org.tw
Background: The effects of the various dialysis
modalities on patient survival are different, especially for diabetic
patients. Hemodialysis (HD) and peritoneal dialysis (PD) are the predominant
renal replacement modalities. This study analyzes modality-related mortality
in long-term dialysis patients.
Methods: This prospective cohort study was conducted
between May 1991 and October 2005. Incident patients that had initiated
dialysis and had been on dialysis for more than 3 months were enrolled. All
cause, infection related, and cardiovascular disease-related mortalities were
used as end points. Patient survival was analyzed by the Cox proportional
hazards model after adjusting for age, sex, diabetes, comorbidity, and
time-averaged values of laboratory data to control influential
covariates.
Results: In total, 1347 patients (258 on PD and 1089 on
HD) were enrolled. Adjusted all cause, infection related, and cardiovascular
disease-related mortality did not differ significantly between HD and PD
patients. In diabetic patients, adjusted all-cause [HD vs PD: hazard ratio
(HR) 0.717, 95% confidence interval (CI) 0.400 – 1.282] and
infection-related mortality (HD vs PD: HR 1.341, 95% CI 0.453 – 3.969)
did not differ significantly between patients on HD and patients on PD.
However, adjusted cardiovascular disease-related mortality increased
significantly in diabetic PD patients (HD vs PD: HR 0.375, 95% CI 0.154
– 0.913). For nondiabetic patients, adjusted all cause, infection
related, and cardiovascular disease-related mortality did not differ
significantly between HD and PD patients.
Conclusions: Dialysis modality had no significant
impact on all-cause or infection-related mortality. More studies are needed to
clarify the putative difference in cardiovascular mortality risk between
diabetic patients on PD and diabetic patients on HD.
KEY WORDS: Mortality risk; cardiovascular disease; diabetes mellitus; modality; hemodialysis.
Received 10 December 2007; accepted 4 July 2008.
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