Initially when I saw the surgeon, she said 5-10 years on ai. Then saw oncologist and he said 5 years - that research doesn’t really show a major difference in increasing the time to 10 years. I’ve seen some on here talk about the “breast cancer index” and other tests that are supposed to help determine if you should stay on longer. I went over one of them online but didn’t feel it gave me the right information as it indicated I wouldn’t benefit from any ai therapy but didn’t take into account oncotype, Ki67 etc. I haven’t really researched a lot more, May when it gets closer to the 5 year mark.