If you were looking for yet another reason to trash that last pack of cigarettes, medical journal Archives of Internal Medicine has got one for you. Smoking slightly ups your odds of developing breast cancer, according to a study.

USA Today reports a study followed 110,000 women over a 30-year period and found that smoking upped the odds of breast cancer by 6 percent. And women who start smoking before they have children have an 18 percent greater risk.

The World Health Organization says smoking kills 5.7 million people a year.

If you’ve managed to quit smoking, what worked for you?

Smoking slightly increases the risk of breast cancer, a new study shows [USA Today]

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