Further Information

Passive smoking and breast cancer in never smokers: prospective study and meta-analysis | Kirstin Pirie, Valerie Beral, Richard Peto, Andrew Roddam, Gillian Reeves; Jane Green for the Million Women Study Collaborators
Article Published: 2008/06/10

Details:
Risk: 0.98, 0.98, 1.02
Type: Prospective
Funding Source: Cancer Research UK, The NHS Breast Screening Programme and the Medical Research Council
Significance: Not Statistically Significant Negative

Published By: International Journal of Epidemiology 2008;37:1069–1079

Further Information

Here is a British study with impeccable antismoking credentials. Yet you will never know that it exists from the mass-media. Why?

The reason is simple: it puts the full stop to the fraud that passive smoking exposure “causes” breast cancer. The study is big.

“In the large prospective study, 224,917 never smokers who completed a questionnaire that asked women whether their parents had smoked and if their current partner smoked were followed up for an average of 3.5 years for incident breast cancer. In the meta-analysis, studies that had recorded exposure information prospectively and retrospectively were considered separately.”

Conclusions:

“Aggregate results from studies with prospectively reported information show that the incidence of breast cancer is similar in women who did and did not report passive exposure to tobacco smoke either as a child or as an adult. The aggregate findings from the retrospective studies may have been distorted by some women becoming more likely to report past exposures because they knew that they had breast cancer.”


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