Through diagnostic tests (each disease has tests associated to standardize the results and make it more objective) and differential diagnosis. I don't have any

Through diagnostic tests (each disease has tests associated to standardize the results and make it more objective) and differential diagnosis. I don't have any names off the top of my head, but see something like the Apgar score to get an idea of what would go into evaluating a person's presented traits. For example depression has a series of question that identify a risk score and a threshold for treatment. Some further reading if you are interested http://en.wikipedia.org/wiki/Medical_diagnosis http://en.wikipedia.org/wiki/Medical_diagnosis http://en.wikipedia.org/wiki/Differential_diagnosis http://en.wikipedia.org/wiki/Differential_diagnosis http://en.wikipedia.org/wiki/SOAP_note http://en.wikipedia.org/wiki/SOAP_note http://en.wikipedia.org/wiki/Apgar_score http://en.wikipedia.org/wiki/Apgar_score