Racial variation in cardiovascular disease risk factors among European children on renal replacement therapy-results from the European Society for Paediatric Nephrology/European Renal Association - European Dialysis and Transplant Association Registry.

Tjaden, Lidwien A; Jager, Kitty J; Bonthuis, Marjolein; Kuehni, Claudia E; Lilien, Marc R; Seeman, Tomas; Stefanidis, Constantinos J; Tse, Yincent; Harambat, Jérôme; Groothoff, Jaap W; Noordzij, Marlies (2017). Racial variation in cardiovascular disease risk factors among European children on renal replacement therapy-results from the European Society for Paediatric Nephrology/European Renal Association - European Dialysis and Transplant Association Registry. Nephrology, dialysis, transplantation, 32(11), pp. 1908-1917. Oxford University Press 10.1093/ndt/gfw423

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Background

Racial differences in overall mortality rates have been found in children on renal replacement therapy (RRT). We used data from the European Society for Paediatric Nephrology/European Renal Association - European Dialysis and Transplant Association Registry to study racial variation in the prevalence of cardiovascular disease (CVD) risk factors among European children on RRT.

Methods

We included patients aged <20 years between 2006-13 who (i) initiated dialysis treatment or (ii) had a renal transplant vintage of ≥1 year. Racial groups were defined as white, black, Asian and other. The CVD risk factors assessed included uncontrolled hypertension, obesity, hyperphosphataemia and anaemia. Differences between racial groups in CVD risk factors were examined using generalized estimating equation (GEE) models while adjusting for potential confounders.

Results

In this study, 1161 patients on dialysis and 1663 patients with a transplant were included. The majority of patients in both groups were white (73.8% and 79.9%, respectively). The crude prevalence of the CVD risk factors was similar across racial groups. However, after adjustment for potential confounders, Asian background was associated with higher risk of uncontrolled hypertension both in the dialysis group [odds ratio (OR): 1.27; 95% confidence interval (CI): 1.01-1.64] and the transplant group (OR: 1.37; 95% CI: 1.11-1.68) compared with white patients. Patients of Asian and other racial background with a renal transplant had a higher risk of anaemia compared with white patients (OR: 1.50; 95% CI: 1.15-1.96 and OR: 1.45; 95% CI: 1.01-2.07, respectively). Finally, the mean number of CVD risk factors among dialysis patients was higher in Asian patients (1.83, 95% CI: 1.64-2.04) compared with white patients (1.52, 95% CI: 1.40-1.65).

Conclusions

We found a higher prevalence of modifiable CVD risk factors in Asian children on RRT. Early identification and management of these risk factors could potentially improve long-term outcomes.

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