A new study finds that the incidence of advanced breast cancer among women aged 50 to 59 is lower in counties that get annual mammograms in their 40s.
Counties that have finished their screening program for people ages 40 to 49 have seen the number of stage 4 cancer cases in women ages 50 to 59 jump 10.3% within six years.
This is according to a study by a research team from the University of Ottawa and Ottawa Hospital, published in the journal Current Oncology and released on Wednesday.
At the same time, there is a lower incidence of stage 2, 3 and 4 breast cancers in women aged 40 to 49 years and stages 2 and 3 in women aged 50 to 59 years in districts with annual screening at age 40 .
Dr Anna Wilkinson, co-lead author of the study and associate professor at the University of Ottawa School of Medicine said.
Fifties who were not screened in their forties have more advanced stage breast cancer. Therefore, they require more intensive treatments and their prognosis is less favorable, compared to women diagnosed at an early stage.”
This research also showed a lower survival rate in those diagnosed with advanced-stage cancer. The five-year survival rate is 99.8% for stage 1 cancers, compared to just 23.2% for cancers diagnosed in stage 4. The Comprehensive Cancer Network, in the US, which recommends starting mammograms as early as age 40 In women at average risk. Dr Jan Seely, chief of the Ottawa Hospital Breast Imaging Service and professor at the University of Ottawa School of Medicine, said.
Today, only Nova Scotia, Prince Edward Island, and Yukon send annual reminders to women in their forties to be shown.
The study analyzed data from the Canadian Cancer Registry on 55,490 women ages 40 to 59 diagnosed with breast cancer between 2010 and 2017.
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