It's an interesting area anno. I had a letter that said something like "as a trial we are only going to call in half the women in your age group (early 60s) and you are in the group that is going to be called in" But it was less clear than that... a fine example of un-plain english. Flux I think, sums it up.
The thing is that there is a peak in BC, as you can see on the graph, in the 60s age group. But there are still around 15,000 cases a year in the over 70s. And the incidence, as in number of cases per 100,000 women in that age group, is as high in the very elderly as it is in the early 60s.
These days there is no reason why most women over 70 cannot be treated successfully for early breast cancer. Interesting that, according to cancerresearchuk
"Women aged over 71 are not currently eligible for screening, and some studies have shown that women over 70 are less likely than younger women to receive surgery or radiotherapy for their breast cancer, which may explain the relatively slower change in mortality rates over time for this group."
Of course some of the non-treatment maybe because of frailty, and there may be some late diagonsis due to patient behaviour but it maybe also that women over 70 are not being diagnosed as early, or looked after as well as younger women.
www.cancerresearchuk.org/cancer-info/cancerstats/types/breast/incidence/uk-breast-cancer-incidence-statistics#age