The main findings of the research were:
Psychiatric diagnoses all use different decision-making rules
There is a huge amount of overlap in symptoms between diagnoses
Almost all diagnoses mask the role of trauma and adverse events
Diagnoses tell us little about the individual patient and what treatment they need
The authors conclude that diagnostic labelling represents 'a disingenuous categorical system'.
Lead researcher Dr Kate Allsopp, University of Liverpool, said: "Although diagnostic labels create the illusion of an explanation they are scientifically meaningless and can create stigma and prejudice. I hope these findings will encourage mental health professionals to think beyond diagnoses and consider other explanations of mental distress, such as trauma and other adverse life experiences."[Quote/]
https://www.sciencedaily.com/releases/2019/07/190708131152.htm
I always said: psych is not really the same as mathematics