The likelihood of a severe relapse and a readmission at this weight is pretty certain.
Sigh. Another rant about how BMI is not a diagnostic tool but it seems impossible to get anyone to listen. I have found a wonderful paper from the Council of the Royal College of Psychiatrists, that would appear to refute the consultant's claim that a BMI of 17.3 "is fine". I wonder if he is a member and would like to take it up with the Council? Or perhaps the Council would like to take it up with him? Then again, pigs may fly.