Hand- and Object-Mouthing of Rural Bangladeshi Children 3–18 Months Old

Kwong, Laura H.; Ercumen, Ayse; Pickering, Amy J.; Unicomb, Leanne; Davis, Jennifer; Luby, Stephen P.

doi:10.3390/ijerph13060563

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Hand- and Object-Mouthing of Rural Bangladeshi Children 3–18 Months Old

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Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, USA

Division of Epidemiology, School of Public Health, University of California, Berkeley, CA 94720, USA

Woods Institute for the Environment, Stanford University, Stanford, CA 94305, USA

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International Centre for Diarrhoeal Disease Research, Dhaka 1212, Bangladesh

Author to whom correspondence should be addressed.

Academic Editors: Helena Solo-Gabriele and Alesia Ferguson

Int. J. Environ. Res. Public Health 2016, 13(6), 563; https://doi.org/10.3390/ijerph13060563

Received: 1 February 2016 / Revised: 12 May 2016 / Accepted: 26 May 2016 / Published: 4 June 2016

(This article belongs to the Special Issue Children’s Exposure to Environmental Contaminants)

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Abstract

Children are exposed to environmental contaminants by placing contaminated hands or objects in their mouths. We quantified hand- and object-mouthing frequencies of Bangladeshi children and determined if they differ from those of U.S. children to evaluate the appropriateness of applying U.S. exposure models in other socio-cultural contexts. We conducted a five-hour structured observation of the mouthing behaviors of 148 rural Bangladeshi children aged 3–18 months. We modeled mouthing frequencies using 2-parameter Weibull distributions to compare the modeled medians with those of U.S. children. In Bangladesh the median frequency of hand-mouthing was 37.3 contacts/h for children 3–6 months old, 34.4 contacts/h for children 6–12 months old, and 29.7 contacts/h for children 12–18 months old. The median frequency of object-mouthing was 23.1 contacts/h for children 3–6 months old, 29.6 contacts/h for children 6–12 months old, and 15.2 contacts/h for children 12–18 months old. At all ages both hand- and object-mouthing frequencies were higher than those of U.S. children. Mouthing frequencies were not associated with child location (indoor/outdoor). Using hand- and object-mouthing exposure models from U.S. and other high-income countries might not accurately estimate children’s exposure to environmental contaminants via mouthing in low- and middle-income countries. View Full-Text

Keywords: non-dietary ingestion; child behavior; mouthing; exposure factors; rural; Bangladesh

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

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MDPI and ACS Style

Kwong, L.H.; Ercumen, A.; Pickering, A.J.; Unicomb, L.; Davis, J.; Luby, S.P. Hand- and Object-Mouthing of Rural Bangladeshi Children 3–18 Months Old. Int. J. Environ. Res. Public Health 2016, 13, 563. https://doi.org/10.3390/ijerph13060563

AMA Style

Kwong LH, Ercumen A, Pickering AJ, Unicomb L, Davis J, Luby SP. Hand- and Object-Mouthing of Rural Bangladeshi Children 3–18 Months Old. International Journal of Environmental Research and Public Health. 2016; 13(6):563. https://doi.org/10.3390/ijerph13060563

Chicago/Turabian Style

Kwong, Laura H., Ayse Ercumen, Amy J. Pickering, Leanne Unicomb, Jennifer Davis, and Stephen P. Luby. 2016. "Hand- and Object-Mouthing of Rural Bangladeshi Children 3–18 Months Old" International Journal of Environmental Research and Public Health 13, no. 6: 563. https://doi.org/10.3390/ijerph13060563

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Hand- and Object-Mouthing of Rural Bangladeshi Children 3–18 Months Old

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