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Effect of haemodialysis session frequency and duration on survival in Australian end-stage kidney disease patients: a retrospective cohort study


Emmett, C and Macintyre, K and Kitsos, A and McKercher, CM and Jose, MD and Bettiol, SS, Effect of haemodialysis session frequency and duration on survival in Australian end-stage kidney disease patients: a retrospective cohort study, ISN World Congress of Nephrology 2019, 12-15 April, Melbourne, Australia, pp. S12. ISSN 2468-0249 (2019) [Conference Extract]


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DOI: doi:10.1016/j.ekir.2019.05.046


Introduction: End-stage kidney disease patients have increased mortality compared to the general population. Haemodialysis (HD) of more frequent and of longer duration has been proposed to improve survival but it remains unclear if this is attributed to increased frequency, duration, or both. We aimed to examine the independent effects of session frequency and duration on mortality in incident HD patients.

Methods: A retrospective cohort study was performed using data from the Australian and New Zealand Dialysis and Transplant Registry examining non-Indigenous patients aged ≥18 years who initiated HD of ≥3 sessions/week in Australia from 2001 to 2015. Initial dialysis prescription was categorized as session duration >5 h/session compared to ≤5 h/session and session frequency as >3 sessions/week compared to 3 sessions/week. Survival analysis was performed using Cox regression analysis, with multivariable analysis controlling for available covariates.

Results: We examined 16 944 patients of whom 757 (4.5%) received >3 sessions/week and 518 (3.1%) received >5 h/session. After controlling for frequency, patients initiated on HD sessions >5 h had a significantly reduced risk of mortality compared with patients with HD session ≤5 h (adjusted hazard ratio (HR) = 0.57; 95% confidence interval (CI) = 0.44-0.74). In contrast, patients initiated on >3 sessions/week of HD had a similar risk of death when compared with patients on 3 sessions/week of HD (adjusted HR = 0.97; 95% CI = 0.84-1.13), after controlling for duration. Limitations include potential residual confounding and changes in exposure over time.

Conclusions: Longer duration rather than increased frequency of treatment appears to reduce mortality in HD patients. This has implications for management and requires further study.

Item Details

Item Type:Conference Extract
Keywords:Australian and New Zealand Data Registry (ANZDATA), end-stage kidney disease (ESKD), haemodialysis (HD), dialysis prescription, renal replacement therapy (RRT)
Research Division:Biomedical and Clinical Sciences
Research Group:Clinical sciences
Research Field:Nephrology and urology
Objective Division:Health
Objective Group:Clinical health
Objective Field:Diagnosis of human diseases and conditions
UTAS Author:Macintyre, K (Dr Kate Macintyre)
UTAS Author:Kitsos, A (Mr Alex Kitsos)
UTAS Author:McKercher, CM (Dr Charlotte McKercher)
UTAS Author:Jose, MD (Professor Matthew Jose)
UTAS Author:Bettiol, SS (Dr Silvana Bettiol)
ID Code:131972
Year Published:2019
Deposited By:Medicine
Deposited On:2019-04-15
Last Modified:2019-07-16
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