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Glomerular Hyperfltration as Predictor of Cardiometabolic Risk Factors among Children and Adolescents: The Childhood and Adolescence Surveillance and Prevention of Adult‑V Study
Abstract
Background: The prevalence of glomerular hyperfltration and chronic kidney disease is increasing worldwide in parallel with obesity hypertension epidemic. The effect of increases in glomerular
fltrations (GFR) in children with metabolic syndrome has not been studied. The purpose of the present study is to investigate the relationship between GFR and cardiometabolic risk factors in
a large sample of pediatric population.
Methods: In this nationwide survey, 3800 participants were selected by cluster random sampling from 30 provinces in Iran. Anthropometric measures, biochemical, and clinical parameters were measured. We also measured estimated GFR (eGFR) using the recently modifed Schwartz equations and other known cardiometabolic risk factors such as elevated total cholesterol, high low‑density lipoprotein cholesterol (LDL‑C), and obesity.
Results: The response rate was 91.5% (n = 3843). The mean and standard deviation (SD) (Mean ± SD) of eGFR for girls, boys, and total population were 96.71 ± 19.46, 96.49 ± 21.69, and 96.59 ± 20 ml/min/1.73 m2, respectively. Overall, 38.7% of the participants
did not have any cardiometabolic risk factor. In multivariate models, the risk of elevated systolic blood pressure (BP) (odds ratio [OR]: 1.48; 95% confdence interval [CI]: 1.08–2.02), elevated diastolic BP (OR: 1.48; 95% CI: 1.08–2.02), elevated LDL‑C (OR: 1.35; 95% CI: 1.07–1.70), and obesity (OR: 1.70; 95%CI: 1.24–2.33) were signifcantly higher in participants with higher eGFR level than those with the lower level but not with low level of high‑density lipoprotein
cholesterol (OR: 0.72; 95% CI: 0.60–0.88).
Conclusions: This study demonstrates an association between glomerular hyperfltration and obesity‑related hypertension in a large sample of the Iranian pediatric population, independently of other classical risk factors.
Keywords: Cardiometabolic risk factors, children and adolescents, estimated glomerular fltration rate
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