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Exposure to inorganic arsenic in drinking water and total urinary arsenic concentration in a Chilean population

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2005-06
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Cáceres Lillo, Dante
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Exposure to inorganic arsenic in drinking water and total urinary arsenic concentration in a Chilean population
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Author
  • Cáceres Lillo, Dante;
  • Pino Zúñiga, Paulina;
  • Montesinos Belmar, Néstor;
  • Atalah Samur, Eduardo;
  • Amigo Cartagena, Hugo;
  • Loomis, Dana;
Abstract
The relationship of inorganic arsenic exposure through drinking water and total urinary arsenic excretion in a nonoccupationally exposed population was evaluated in a cross-sectional study in three mayor cities of Chile (Antofagasta, Santiago, and Temuco). A total of 756 individuals in three population strata (elderly, students, and workers) provided first morning void urine specimens the day after exposure and food surveys were administered. Arsenic intake from drinking water was estimated from analysis of tap water samples, plus 24-h dietary recall and food frequency questionnaires. Multilevel analysis was used to evaluate the effects of the age group and city factors adjusted by predictor variables. Arsenic levels in drinking water and urine were significantly higher in Antofagasta compared with the other cities. City-and individual-level factors, 12% and 88%, respectively, accounted for the variability in urinary arsenic concentration. The main predictors of urinary arsenic concentration were total arsenic Consumption through water and age. These findings indicate that arsenic concentration in drinking water continues to be the principal contributing factor to exposure to inorganic arsenic in the Chilean population.
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URI: https://repositorio.uchile.cl/handle/2250/127153
ISSN: 0013-9351
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ENVIRONMENTAL RESEARCH 98 (2): 151-159 JUN 2005
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