I have been googling .. 'breast cancer survival over eighties'
and got this:
The study, funded by the Department of Health, revealed that women in Britain are far less likely to be alive three years after diagnosis than those in other well-developed countries.
Researchers at the Cancer Research UK Cancer Survival Group found that 87-89% of women in the UK and Denmark were alive three years after diagnosis, compared to 91-94% in Australia, Canada, Norway and Sweden.
Figures published in the British Journal of Cancer show the biggest difference was in women aged over 70. In the UK the three-year survival rate is 79%, whereas in Sweden it is 91%.
The scientists say the findings suggest older women and those with more advanced disease are treated less aggressively in the UK.
The thing about five or three year survival rate is that 80 y olds may not survive that long when they are well. SMRs - standardised mortality ratios are a better measure and this is a fraction - and a SMR of 2 means they die twice as quickly as the control group. A useful measure in the 80s population as they are gonna die at a certain rate anyway.
When I was looking at this for my own mother 1994,
tamoxifen alone was as good as tamoxifen and lumpectomy
- that is the SMR was the same for both.