SO glad I happened on this sight. I AM learning more here than GP. Everything I read so far from others is not to worry about what stage you are in, butI do worry because most don't saynif they are on oxygen or not. I HAVE been on oxygen for 2 years only when I am on the move. Told I would be on oxygen for rest of my life along with meds. I ask about stage and he says your lungs hanging by thread and stage 3, but because of age 71 it is stage 4, yet pft is moderate. Any input?