The study by five Spanish universities (Asturias, Granada, Murcia, Navarra and San Sebastian) confirms previous vidence concerning the relationship between alcohol intake and breast cancer.
Of all of the females examined, 11,576 were diagnosed with breast cancer over the course of the eleven-year monitoring study.
"A woman`s average risk of being diagnosed with breast cancer increases by 4 per cent with each additional 10 grams/day of alcohol." said Maria Dolores Chirlaque, one of the Spanish scientists who was part of the team.
"In other words, a daily intake of one glass of wine or beer - or less - would correspond to a risk value of 1.
However, if we increase our intake to two daily glasses of wine or beer, our risk would rise by 4 per cent," she said.
"Using a reference value between 0 and 5 grams per day, an increase of up to 15 grams/day is linked to a 5.9 per cent greater risk of breast cancer," said Chirlaque, professor from the University of Murcia.
The number of years of exposure to alcohol intake also influences a woman`s risk of developing breast cancer. Thus, the longer a woman has been exposed to alcohol consumption, the greater a risk she has, especially if alcohol intake began before her first pregnancy.
"Alcohol intake is a breast cancer risk factor that can be changed by a personal decision to form healthy habits.
Hence, women must be advised and forewarned of the possibility they have to control this factor," researchers said.
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