Which psychiatric disorder,if any,can be definitely established by a laboratory test?

Question

Which psychiatric disorder,if any,can be definitely established by a laboratory test?​

Quizplus · Accepted Answer

Currently, there are no laboratory tests that can definitively establish any psychiatric disorder. The diagnosis of psychiatric disorders is made based on clinical assessments, such as self-report measures, interviews, and observations, and often requires the input of mental health professionals such as psychiatrists and psychologists. While there may be some laboratory tests that can support or aid in the diagnosis of certain psychiatric disorders, none can definitively establish them.

Which Psychiatric Disorder,if Any,can Be Definitely Established by a Laboratory