In a split with Cancer Society recommendations, a federal panel said it found no compelling evidence to warrant lowering the routine screening age to 40 for average-risk individuals.
A highly anticipated update to Canada’s national breast screening guidelines says people in their 40s shouldn’t be routinely screened for the disease, but also shouldn’t be stopped from getting a mammogram if they want one.
Despite the changes, Guylène Thériault, co-chair of the national task force, said panel members and expert advisers didn’t find compelling scientific evidence that would warrant a lowering of the screening age for average-risk individuals. Instead, the guidelines are focused on providing information to help people at various ages determine whether screening is right for them.
One of the central questions the task force faced was how to properly balance the potential benefits of screening mammography with the possible harms. While the evidence is clear that screening mammograms can play a pivotal role for women in their 50s and beyond, the age at which breast cancer incidence goes up dramatically, it’s less clear for people in their 40s.
Dr. Thériault noted that the task force included a wide range of evidence, as well as analyses of women’s values and preferences around screening, to come to its conclusions. And while many proponents suggest earlier screening starting at age 40 will save lives, the data are less clear. Dr. Thériault noted that 1,000 women would have to be screened for 10 years to prevent one breast cancer-related death.
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