I'll start with statistics. When I say 40% to 60%, it's based on different studies that have been published in terms of treatment outcomes. It's not necessarily 40% to 60% concerning those specific individuals, but multiple studies. I think one of the studies published in The American Journal of Psychiatry quoted that if individuals follow evidence-based treatment, about 50% will fully recover.
Speaking as a clinician, we tend to look at things as “thirds”. With almost all mental health conditions, one-third will fully recover, one-third will get significantly better, and one-third will have a chronic course where they're continuing to have symptoms.