Abstract
Background
The objective of this study was to investigate some biomarkers of renal function and blood pressure in children who had recovered from undernutrition.
Methods
This was cross-sectional, comparative study in which a convenience sample of children of both genders (n = 126; age range 6–16 years) treated at the Centre for Nutritional Recovery and Education (São Paulo, Brazil) was used. These children were classified into four groups for analysis: (1) children who were well nourished (control group; n = 50), (2) those showing stunted growth (stunted group; n = 22), (3) those who were underweight (underweight group; n = 23) and (4) those who had recovered from undernutrition (recovered group; n = 31).
Results
No between-group differences were found for mean levels of albuminuria, serum creatinine and cystatin C, and similar mean estimates of glomerular filtration rate (eGFR; using either creatinine, cystatin C or both). Almost 14% of the stunted group, 4% of the underweight group and 3% of the recovered group had albuminuria of >30 mg/g creatinine (chi-square p = 0.034); none of the control children showed albuminuria of >30 mg/g creatinine. Mean systolic (SBP) and diastolic blood pressure (DBP) adjusted for age and gender of the children in the stunted [SBP (95% confidence interval): 92 (88–96) mmHg; DBP: 47 (44–49) mmHg] and recovered [SBP: 93 (90–96) mmHg; DBP: 49 (47–51) mmHg] groups were significantly lower than those of the controls [SBP: 98 (95–100) mmHg, P = 0.027; DBP: 53 (52–55) mmHg, P = 0.001]. After additional adjustment for height, mean DBP remained significantly lower in the recovered group compared with the control group [49 (46–51) vs. 53 (51–55) mmHg, respectively; P = 0.018). Logistic regression analysis showed that the stunted group had a 8.4-fold higher chance of developing albuminuria (>10 mg/g creatinine) than the control children (P = 0.006).
Conclusions
No alterations in renal function were found in underweight children and those who had recovered from undernutrition, whereas children with stunted growth presented with a greater risk for albuminuria. A lower DBP was found in children with stunted growth and those who had recovered from undernutrition.
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Acknowledgments
This research was supported by FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo, Brazil); grant number 2010/51237-2. V. JBM was supported by CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior), and ALS was supported by the CNPQ (Conselho Nacional de Desenvolvimento Científico e Tecnológico) fellowship, number 302740/2010-4. RS receives a research grant from the CNPq. FAPESP, CAPES and CNPq had no role in the design, analysis or writing of this article.
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The authors declare that there are no conflicts of interest in this paper.
Ethical approval
The study procedures are in accordance with the principles of the Helsinki Declaration (1964) and national resolutions. All families signed the Free and Informed Consent form, and the study was approved by the Research Ethics Committee of the Federal University of São Paulo (UNIFESP-CEP 1302/09).
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Martins, V.J.B., Sesso, R., Clemente, A.P.G. et al. Albuminuria, renal function and blood pressure in undernourished children and recovered from undernutrition. Pediatr Nephrol 32, 1555–1563 (2017). https://doi.org/10.1007/s00467-017-3602-y
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DOI: https://doi.org/10.1007/s00467-017-3602-y