I am not aware of studies about predicting irremediability. Irremediability isn't a clinical term; it's a legal term. One of the things the panel tried to do was to give it some clinical flesh, if you will, and put it in terms that clinicians can understand.
I'm going to just modify your question slightly, if you'll let me, and say there are studies about predicting, for example, treatment resistance. That's a term that would be more familiar in psychiatry, for example, amongst people with a certain condition who have had certain kinds of treatments. For example, when we do research on treatment resistance, we certainly identify subjects to enrol in those studies, so you could say, yes, the researchers—clinicians often—who recruit patients for those studies come to agreement on who are treatment-resistant patients and who are not.