Measurement of low levels of arsenic exposure: a comparison of water and toenail concentrations

A study was conducted to evaluate toenail arsenic concentrations as a biologic marker of drinking water arsenic exposure. Study subjects were controls in a US population-based case-control study of nonmelanoma skin cancer, randomly selected from drivers' license records (those < 65 years of...

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Published in:American journal of epidemiology 2000-07, Vol.152 (1), p.84-90
Main Authors: Karagas, M R, Tosteson, T D, Blum, J, Klaue, B, Weiss, J E, Stannard, V, Spate, V, Morris, J S
Format: Article
Language:English
Subjects:
Adult
Aged
Arsenic - analysis
Case-Control Studies
Environmental Exposure - analysis
Female
Humans
Male
Middle Aged
Nails - chemistry
Toes
Water - chemistry
Water Supply
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cited_by cdi_FETCH-LOGICAL-c411t-72c25d837f7368ee4e2a85664dcb2976ed09c28cb0775291322de31fb9304a093
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container_start_page 84
container_title American journal of epidemiology
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creator Karagas, M R
Tosteson, T D
Blum, J
Klaue, B
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Stannard, V
Spate, V
Morris, J S
description A study was conducted to evaluate toenail arsenic concentrations as a biologic marker of drinking water arsenic exposure. Study subjects were controls in a US population-based case-control study of nonmelanoma skin cancer, randomly selected from drivers' license records (those < 65 years of age) and Medicare enrollment files (those > or = 65 years of age). Between 1994 and 1997, a total of 540 controls were interviewed and toenail samples of sufficient weight were collected from 506 (93.7%) of these. Beginning in 1995, a sample of tap water was taken from the participants' homes; a total of 217 (98.6%) water samples were obtained from the 220 subjects interviewed. Arsenic determinations were made from toenail samples using neutron activation analysis. Water samples were analyzed using hydride-generation magnet sector inductively coupled mass spectrometry. Among 208 subjects with both toenail and water measurements, the correlation (r) between water and nail arsenic was 0.65 (p < 0.001) among those with water arsenic concentrations of 1 microg/liter or higher and 0.08 (p = 0.31) among those with concentrations below 1 microg/liter (overall r = 0.46, p < 0.001). Our data suggest that toenail samples provide a useful biologic marker for quantifying low-level arsenic exposure.
doi_str_mv 10.1093/aje/152.1.84
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1476-6256
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source Oxford Journals Online
subjects Adult
Aged
Arsenic - analysis
Case-Control Studies
Environmental Exposure - analysis
Female
Humans
Male
Middle Aged
Nails - chemistry
Toes
Water - chemistry
Water Supply
title Measurement of low levels of arsenic exposure: a comparison of water and toenail concentrations
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