Dioxin Emissions and Breast Cancer Risk
Author Information
Author(s): Jean-François Viel, Marie-Caroline Clément, Mathieu Hägi, Sébastien Grandjean, Bruno Challier, Arlette Danzon
Primary Institution: CNRS n° 6249 'Chrono-Environment', Faculty of Medicine, Besançon, France
Hypothesis
Is there an association between dioxin emissions from municipal solid waste incinerators and the risk of invasive breast cancer among women living nearby?
Conclusion
The study found no increased risk of invasive breast cancer among younger women exposed to dioxins, but older women in the highest exposure zone had a decreased risk.
Supporting Evidence
- The study included 434 breast cancer cases and 2170 controls.
- Women over 60 in the highest exposure zone had a 0.31 times lower likelihood of developing breast cancer.
- The study used a validated dispersion model to estimate dioxin exposure.
Takeaway
The study looked at whether pollution from a waste incinerator could cause breast cancer. It found that younger women weren't affected, but older women living near the incinerator had a lower chance of getting breast cancer.
Methodology
The study compared 434 breast cancer cases with 2170 controls using a validated dispersion model for dioxin exposure linked to residential locations.
Potential Biases
Potential misclassification of exposure and inability to verify control health status could bias results.
Limitations
The study had a time lag in control selection and relied on census data without individual risk factor information.
Participant Demographics
Women aged 20 years and older diagnosed with invasive breast cancer between 1996 and 2002.
Statistical Information
P-Value
0.31
Confidence Interval
0.08–0.89
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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