A cross-sectional study of urinary cadmium concentrations in relation to dietary intakes in Uruguayan school children

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Título

A cross-sectional study of urinary cadmium concentrations in relation to dietary intakes in Uruguayan school children

Tema

CADMIO
URUGUAY
CADMIO URINARIO
INGESTA ALIMENTICIA
BIBLIOGRAFIA NACIONAL QUIMICA
2019

Abstract

Background Cadmium (Cd) exposure has adverse health effects in children. Diet contributes to Cd exposure, but dietary components could affect body Cd levels. Objective To examine associations between diet and urinary Cd (U-Cd) in children. Methods In this cross-sectional study conducted in Montevideo, Uruguay, Cd exposure of 5–8 year old children (n = 279 with complete data) was assessed in first morning urine (U-Cd), a marker of long-term exposure, measured by ICP-MS and adjusted for specific gravity. Distribution of U-Cd was (median [5%, 95%]: 0.06 [0.02, 0.17] μg/L); data were natural-log-transformed (ln) for statistical analyses. Serum ferritin (SF), an indicator of iron stores, was measured in fasting samples. Trained nutritionists completed two non-consecutive 24-h dietary recalls with both child and caregiver present. Measures of iron, zinc, calcium and fiber intake, and the consumption of grains, root vegetables, milk, and foods rich in heme iron (white and read meats) and non-heme iron (legumes, spinach, broccoli, tomatoes, dried fruit) were derived. Multivariable ordinary least squares (OLS) and ordinal regressions were used to examine associations among tertiles of water Cd, SF, diet, and U-Cd. OLS models were further stratified by sex. Results In covariate-adjusted models, SF was not related to ln-U-Cd. Children in highest tertile of iron and zinc intake had lower ln-U-Cd: (−0.23 [−0.42, −0.03]) and (−0.25 [−0.44, −0.05]), respectively, compared to the reference group. Children consuming higher amounts of foods rich in heme iron had slightly lower ln-U-Cd (−0.17 [−0.36, 0.03]). High grain consumption was related to higher ln-U-Cd (0.25 [0.06, 0.45]). Conclusions Diets rich in grains were related to higher urinary Cd levels among children living in the context of low Cd pollution. Higher intake of iron and zinc was related to lower Cd levels. Given that urinary Cd is mainly a marker of long-term exposure, these findings should be further corroborated.

Autor

Burganowski, Rachael
Vahter, Marie
Queirolo, Elena I.
Peregalli, Fabiana
Vaccino, Valentina
Barcia, Elizabeth
Mangieri, Soledad
Ocampo, Virginia
Martínez, Gabriela.
Kordas, Katarzyna

Fuente

Science of the Total Environment v. 658, 2019. -- p. 1239-1248

Editor

Elsevier

Fecha

2019

Derechos

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PDF

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Inglés

Tipo

Artículo

Identificador

DOI: 10.1016/j.scitotenv.2018.12.220

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Original Format

PDF
Fecha de agregación
March 5, 2020
Colección
Bibliografía Nacional Química
Tipo de Elemento
Document
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Citación
Burganowski, Rachael, “A cross-sectional study of urinary cadmium concentrations in relation to dietary intakes in Uruguayan school children,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed July 12, 2020, http://riquim.fq.edu.uy/items/show/6009.
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