Published in:
Open Access
23-03-2023 | Diabetes | Nephrology - Original Paper
The association between renal hyperfiltration and mortality is not mediated by diabetes mellitus
Authors:
Mounir Ould Setti, Ari Voutilainen, Leo Niskanen, Tomi-Pekka Tuomainen
Published in:
International Urology and Nephrology
|
Issue 10/2023
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Abstract
Background
Renal hyperfiltration (RHF), recently established as a risk factor for mortality, is linked to current and subsequent diabetes mellitus (DM). DM could be seen as a mediator in the pathway between RHF and mortality. However, the mediating role of DM in the relationship between RHF and mortality is unclear.
Methods and results
Based on a cohort of 2682 Finnish men from the Kuopio Ischaemic Heart Disease Risk Factor Study (KIHD) followed-up for 35 years, we evaluated the association between RHF and mortality, with DM as a mediator, following two methods: a classic mediation analysis approach, using Cox regression, and a counterfactual framework for mediation analysis, using g-computation, Cox regression, and logistic regression. RHF is associated with an increased risk of mortality. This association was not mediated by DM. Under a counterfactual framework and on a hazard ratio scale, RHF association with mortality had a total effect of 1.54 (95% confidence interval, 1.26–1.98) and a controlled direct effect of 1.66 (1.34–2.16).
Conclusion
An association between RHF and mortality risk, independent of DM, was established. RHF should be considered, managed, and followed-up as a mortality-associated condition, regardless of the status of DM. We suggest clinicians to consider including RHF screening in routine clinical care, especially diabetic care.