Panic disorder seems a bit different than the others we are studying at least according to the text. It seems different in the way that it is not triggered or caused by a situation but to a learned idea that to loose control of yourself in public would be "catestrophic". I'm not sure what is ment by the question, "is it a useful classification?" Any ideas anyone? As long as you answer yes to all of the questions that don't relate to environmental influence or drugs, you are classified with the disorder the test specifies.