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Editor's Correspondence
Sep 12, 2011

Analysis of Passive Smoking and Breast Cancer of Limited Value

Author Affiliations

Author Affiliations: Science Integration Division, Centre for Chronic Disease Prevention and Control, Public Health Agency of Canada, Ottawa, Ontario, Canada (Dr Johnson); Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada (Dr Miller); School of Public Health, University of California, Berkeley (Dr Hammond); and Canadian Expert Panel on Tobacco Smoke and Breast Cancer Risk and Physicians for a Smoke-Free Canada, Ottawa (Mr Collishaw).

Arch Intern Med. 2011;171(16):1508-1510. doi:10.1001/archinternmed.2011.383

The findings from the Nurses Health Study1 of increased breast cancer risk associated with longer duration of smoking, higher pack-years, younger age at smoking initiation, and smoking before first birth are consistent with those from 9 cohort studies recently summarized by the Canadian Expert Panel on Tobacco Smoke and Breast Cancer Risk.2

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