@Garnet7, I've been on AI's for just over 5 years. My Onc initially said 5 years. As I approached 4 years I adked the question again and he said the evidence supported 7 years, but wasn't as clear cut beyond that. Last time I saw him, he went through an algorithm that put me in a high risk category and recommended 10years. It's been a moving feast. I agreed to aim for 8 years and reassess as I went.
They need to take in to account the potential risks and benefits. The AI's affect our bone health and increase our long term risk of cardiac events as oestrogen has a protective effect. The algorithm takes in to account tumour size, grade (I think) number of positive nodes, age at diagnosis.
Someone else I know sees a different Onc, was older at diagnosis smaller tumour and node negative. She's been told 5 years
