Arsenic Exposure and Type 2 Diabetes: A Systematic Review
Author Information
Author(s): Ana Navas-Acien, Ellen K. Silbergeld, Robin A. Streeter, Jeanne M. Clark, Thomas A. Burke, Eliseo Guallar
Primary Institution: Johns Hopkins University Bloomberg School of Public Health
Hypothesis
Does chronic arsenic exposure contribute to the development of type 2 diabetes?
Conclusion
The evidence on the association between arsenic exposure and diabetes risk is inconclusive and insufficient to establish causality.
Supporting Evidence
- 19 in vitro studies were identified, but they provided limited insight into mechanisms.
- 10 in vivo studies showed inconsistent effects of arsenic on glucose metabolism.
- 19 epidemiologic studies indicated a pooled relative risk estimate of 2.52 for diabetes in high-arsenic areas.
Takeaway
This study looked at whether arsenic in drinking water can make people more likely to get diabetes, but the results were mixed and unclear.
Methodology
The authors performed a systematic review of experimental and epidemiologic studies on arsenic and type 2 diabetes, assessing various studies for quality and relevance.
Potential Biases
Potential biases include selection bias in study populations and misclassification of diabetes status.
Limitations
Methodologic problems limit the interpretation of the association, including lack of individual measures of arsenic exposure and inconsistent diabetes diagnosis criteria.
Participant Demographics
The studies included both general populations and occupational groups, with varying age ranges and exposure levels.
Statistical Information
P-Value
2.52
Confidence Interval
1.69–3.75
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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