Scientists in the US have established a new link between increased risk of breast cancer in older women and exposure to tobacco smoke.
The results held true even after accounting for increased alcohol consumption levels, which has already been established as a risk factor.
Former smokers were found to have a 7% higher chance of developing the deadly disease than those who had never smoked.
- US scientists who tracked the progress of 186,000 women aged between 50 and 71 found that those who smoked were 19% more to develop breast cancer than those who had not ever smoked
- Women who previously smoked but had managed to give up were 7% more at risk
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