Hi Thomas,
Congratulation on a very good response- BCR-ABL at 0.8% (IS) is well below the ELNet recommended goal of less than 10% Ph+ at 3 months.
CCyR is normally considered to be 1.5% Ph+, so at 0.8% IS you are well into the 'realm of the molecular' and almost at MMR (0.1%IS) already, so you should feel very happy with this result.
Of course, everyone is an individual and the ELNet/NCCN goals and response rates can only be a general guide for the likely majority- but as far as anyone can be sure, if your PCR results continue to show this downward trend you can be very sure of living out your normal lifespan, at least as far as CML is concerned.
Should you maintain MMR or even lower, for the next few years (at least 2) you may well then be a candidate for the de-escalation/discontinuation studies (DESTINY) which, if successful, will mean that even more people will be able to achieve treatment free remission (TFR) or if not that at least a reduction in dose (with the hoped for reduction in side effects) and a better quality of life.
All in all you are showing an optimal response, try to relax and be positive for the future.
Best wishes,