Hearing loss in children with e-waste lead and cadmium exposure

Environmental chemical exposure can cause neurotoxicity and has been recently linked to hearing loss in general population, but data are limited in early life exposure to lead (Pb) and cadmium (Cd) especially for children. We aimed to evaluate the association of their exposure with pediatric hearing...

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Bibliographic Details
Published in:The Science of the total environment 2018-05, Vol.624, p.621-627
Main Authors: Liu, Yu, Huo, Xia, Xu, Long, Wei, Xiaoqin, Wu, Wengli, Wu, Xianguang, Xu, Xijin
Format: Article
Language:English
Subjects:
Cadmium
Cadmium - toxicity
Child
Child, Preschool
China - epidemiology
E-waste
Electronic Waste
Environmental Exposure - adverse effects
Hearing loss
Hearing Loss - epidemiology
Humans
Lead
Lead - toxicity
Preschool children
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Summary:Environmental chemical exposure can cause neurotoxicity and has been recently linked to hearing loss in general population, but data are limited in early life exposure to lead (Pb) and cadmium (Cd) especially for children. We aimed to evaluate the association of their exposure with pediatric hearing ability. Blood Pb and urinary Cd were collected form 234 preschool children in 3–7years of age from an electronic waste (e-waste) recycling area and a reference area matched in Shantou of southern China. Pure-tone air conduction (PTA) was used to test child hearing thresholds at frequencies of 0.25, 0.5, 1, 2, 4 and 8kHz. A PTA≥25dB was defined as hearing loss. A higher median blood Pb level was found in the exposed group (4.94±0.20 vs 3.85±1.81μg/dL, p
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2017.12.091