Thyroid Function and Perchlorate in Drinking Water among California Newborns
Author Information
Author(s): Patricia A. Buffler, Michael A. Kelsh, Edmund C. Lau, Charlotte H. Edinboro, Julie C. Barnard, George W. Rutherford, Jorge J. Daaboul, Lynn Palmer, Fred W. Lorey
Primary Institution: University of California, Berkeley
Hypothesis
Is there an association between perchlorate concentrations in drinking water and thyroid function in California newborns?
Conclusion
The study found no association between high perchlorate levels in drinking water and the prevalence of congenital hypothyroidism or high TSH levels in newborns.
Supporting Evidence
- 15 cases of congenital hypothyroidism were observed in areas with high perchlorate levels, while 20.4 were expected.
- The adjusted prevalence odds ratio for high TSH was 0.73, indicating no significant association with perchlorate exposure.
- The study controlled for factors like sex, ethnicity, birth weight, and multiple birth status.
Takeaway
This study looked at whether drinking water with perchlorate affects babies' thyroid health, and it found that it doesn't seem to have an impact.
Methodology
The study analyzed newborn screening data from California in 1998, comparing thyroid function in newborns from communities with different levels of perchlorate in drinking water.
Potential Biases
Potential biases may arise from using community-level data for individual exposure assessments.
Limitations
The study's exposure classification did not account for individual water consumption patterns or migration, and laboratory variations could affect TSH screening outcomes.
Participant Demographics
The study included California newborns screened in 1998, with data on sex, ethnicity, birth weight, and multiple birth status.
Statistical Information
P-Value
0.71
Confidence Interval
0.40–1.19
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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