Tobacco smoking and breast cancer risk: an evaluation based on a systematic review of epidemiologic evidence among the Japanese population.

Women who smoke tobacco are more likely to develop breast cancer than those who do not smoke.

This study investigated the correlation between tobacco smoking and the incidence of breast cancer in Japanese women. Researchers systematically reviewed data obtained from 3 cohort and 8 case-control studies that examined tobacco smoking as a risk factor for breast cancer development. They found a higher incidence of breast cancer among smokers than never smokers. The findings of this meta-analysis show that tobacco smoking may increase Japanese women’s chances of developing breast cancer.