Comparison of carbon emissions, water use, and dialysis waste between incremental and full-dose peritoneal dialysis: A cohort study

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Abstract
Introduction: Incremental peritoneal dialysis (PD) may confer environmental benefits compared to full-dose PD due to reduced resource use. We aimed to quantify and compare carbon emissions, water consumption, and waste generation between incremental and full-dose PD in a cohort of incident PD patients. Methods: We compared environmental metrics, including carbon emissions, water consumption, and waste generation between incremental and full-dose PD, using prospectively collected data between June 2019 and May 2024 at the Western Renal Service, Sydney, Australia. Carbon emissions were quantified using standardized coefficients from a published life-cycle analysis, while water and waste volumes were estimated using literature-based assumptions. Group comparisons were conducted using the Mann–Whitney U test, with a two-sided p -value p < 0.001). Incremental PD yielded estimated savings of 201,087 kg carbon dioxide equivalent emissions, over 5 million liters of blue water, 1.8 million liters of gray water, 27,223 kg of landfill waste, and 16,219 kg of recyclable materials. Conclusion: Incremental PD was associated with a lower environmental impact than full-dose PD, highlighting its potential contribution to environmentally sustainable dialysis care.

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