Abstract
Aims
To study the incidence of and the factors associated with renal dialysis and transplantation in type 1 (T1DM) and type 2 diabetes (T2DM).
Methods
Data on individuals who had received dialysis treatment or renal transplant between 1 January 2004 and 31 December 2013 were extracted from the regional administrative database (Piedmont, Italy), and the crude (cumulative) incidence of dialysis was calculated. Overall cumulative survival was estimated using the Kaplan–Meier method and compared using the log-rank test. Poisson regression was used to estimate adjusted rate ratios for potential predictors of renal transplant or death.
Results
A total of 7401 persons started dialysis treatment during the decade, with a 10-year cumulative crude incidence of 16.8/100,000. Incidence was stable and consistently eightfold higher in persons with T2DM (tenfold higher in T1DM) compared to those without diabetes. The risk of dialysis in T1DM was about double that of T2DM. The mortality rate was significantly higher in diabetics than in non-diabetes (241.4/1000 vs. 153.99/1000 person-years). During the decade 2004–2013, 893 patients underwent a kidney transplant. Transplantation rates were significantly lower for diabetics than non-diabetics (16.5/1000 vs. 42.9/1000 person-years).
Conclusions
In the past decade, the incidence of dialysis has stabilized in both the general population and in diabetics in whom it remains far higher by comparison. Also mortality rates are higher, with a worse prognosis for T1DM. Diabetes poses a barrier to allotransplantation, and efforts should be made to overcome this limitation.
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Acknowledgements
CBG and RG contributed to the literature search, study design, data collection, data interpretation, and writing; PC and RP helped in data analysis and interpretation; MS and GC contributed to data interpretation; and BT helped in the literature search and writing support. Dr. Carlo Giorda is the guarantor of this work and, as such, had full access to all the data in the study, and takes responsibility for the integrity of the data and the accuracy of the data analysis. He confirms that all authors consent to publication of this manuscript. There is no funding to report for this submission.
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This is an observational study and data were collected retrospectively. The Local Health Authority of Piedmont region was responsible for collecting and processing these data. The study was commissioned by the Local Health Authority. No ethical approval was required according to Italian law 211/2003, which explains that no ethics committee permission is required for this kind of study.
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According to Italian privacy law, no patient’s or relative’s consent is required for large retrospective population-based studies and if data are published only in aggregated form.
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Giorda, C.B., Carnà, P., Salomone, M. et al. Ten-year comparative analysis of incidence, prognosis, and associated factors for dialysis and renal transplantation in type 1 and type 2 diabetes versus non-diabetes. Acta Diabetol 55, 733–740 (2018). https://doi.org/10.1007/s00592-018-1142-y
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DOI: https://doi.org/10.1007/s00592-018-1142-y