You probably won't get called if you are in your 30's because other people with lower pft's will have higher lung allocation scores. When Mike was originally listed he was at about 30%, didn't use O2 at all. We went for long walks all the time, with a few breaks. Shortly after that, he started requiring O2 at night, then sporadically throughout the day, then eventually all day. His pfts have steadily dropped since then. He is very happy that he went through the eval process while he still had the energy. When he went through it again to get listed in Cleveland, it was much more difficult, but luckily they accepted a lot of what he had already done in Boston. There is nothing to be afraid of as far as getting evaluated. It is a great opportunity to have all of your questions answered. And you DO NOT have to be listed just because you are evaluated... that is totally your choice. And it is not held against you.