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European Journal of Pediatrics 2017-Aug

Blood urea nitrogen to serum creatinine ratio as a prognostic factor in diarrhea-associated hemolytic uremic syndrome: a validation study.

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Alejandro Balestracci
Luciana Meni Battaglia
Ismael Toledo
Sandra Mariel Martin
Caupolican Alvarado

Cuvinte cheie

Abstract

Identifying those children with complicated forms of diarrhea-associated hemolytic uremic syndrome (D+HUS) on admission can optimize their management. Recently, the blood urea nitrogen to serum creatinine ratio (BCR) at admission has been proposed as a novel and accurate predictor of complicated clinical outcome in D+HUS; therefore, we performed this retrospective study aimed to validate such observation in a larger series of patients. A complicated course was defined as developing one or more of the following: severe neurological or bowel injury, pancreatitis, cardiac or pulmonary involvement, hemodynamic instability, hemorrhage, and death. Data from 161 children were reviewed, 50 of them with a complicated disease including five deaths. Those with worse evolution presented a lower admission BCR than those with good outcome (22.5 vs. 30.8; p = 0.005). BCR at admission showed a limited ability to identify children at risk of a complicated course, with an AUC of 0.63 (95% CI 0.58-0.71) and an optimal cutoff point of ≤ 26.7, which achieves a sensitivity of 70% (95% CI 55.2-81.7) and a specificity of 56.7% (95% CI 47-66).

CONCLUSIONS

In this validation study, the BCR at admission provided a limited value to predict severe forms of D+HUS. What is Known: • BCR at admission has been proposed as an accurate predictor of complicated clinical course in children with D+HUS. What is New: • In a larger series of children with D+HUS, we were unable to confirm the usefulness of the admission BCR to early identify those at risk of complicated forms of the disease. • Further research is warranted to improve the optimal detection of these high-risk patients.

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