Fact 39
There is a 30 to 40% increased risk of breast
cancer among women who are current or long-term smokers, women who started
smoking at a younger age, and women who start smoking before giving birth to
their first child.
Source: Li, Christopher I.; Malone, Kathleen E.; Daling, Janet R. The Relationship Between Various Measures of Cigarette Smoking and Risk of Breast Cancer Among Older Women 65–79 years of Age (United States). Cancer Causes and Control, Volume 16, Number 8, October 2005, pp. 975-985(11)