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Renal resistive index as a new independent risk factor for new‐onset diabetes mellitus after kidney transplantation

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Pulse pressure and urinary albumin excretion were recently identified as risk factors of new‐onset diabetes after renal transplantation (NODAT), suggesting that microvascular injury may be implicated in NODAT. However, the relationship between of microvascular injury and NODAT is unknown. In the present long‐term (median follow‐up: 5.7 years; observation period: 4908 patient‐years) retrospective study in 656 renal transplant recipients, the association between baseline renal resistance index (RI, used as a marker of widespread microvascular damage) and the incidence of NODAT was assessed. The incidence of NODAT was 11.2% and 14.6% at 5 and 10 years, respectively, after transplantation. RI at 3 months was a risk factor for NODAT [hazard ratio (HR) per 0.1: 2.19 (1.55–3.09), P < 0.0001]. RI >0.75 (vs. 0 ≤ 0.75) was a potent a predictor of NODAT [HR: 3.29 (1.91–5.67), P < 0.0001], even after adjustments [HR: 3.29 (1.50–7.24), P = 0.0030] on age, weight, glucose, nephropathy, and arterial pressure. Similar results were observed when RI was measured at 1 month [HR per 0.1:1.74 (1.33–2.27), P < 0.0001] and 12 months [HR per 0.1:1.74 (1.33–2.27), P < 0.0001] after transplantation. High RI early after renal transplantation is a long‐term risk factor for NODAT, and could be used to refine the individual risk of NODAT.

Document Type: Research Article


Affiliations: 1:  Service de Néphrologie-Immunologie Clinique, Hôpital Bretonneau, CHRU Tours, Tours, France 2:  INSERM CIC 202, France and Université François Rabelais Tours, France and CHRU de Tours, Tours, France 3:  Pharmacy Department, Hôpital Bretonneau, CHRU Tours, Tours, France

Publication date: April 1, 2012


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