Smoking increases risks of all-cause and breast cancer specific mortality in breast cancer individuals: a dose-response meta-analysis of prospective cohort studies involving 39725 breast cancer cases.

Oncotarget · 2016 · PMC5347758 · PMID 27863414

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only marginally significantno p-value reported

In respect to group of “IV stage” and “no adjustment for menopausal”, only marginally significant associations between smoking duration and the risks of BC specific death and all-cause death were found.

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