(Sorry! Thought ai’d responded to this awhile back)
Is there a specialised medical test for PTSD? I thought that was just the psych diagnosing on their own judgment.
In short? No. Or at least, ideally not.
- There are several hundred medical conditions that can mimic psych conditions, and the most likely of those are ruled out, or possibly ruled in (someone with a hormonal imbalance can also be depressed, or the depression can be caused by the hormonal imbalance, for example.
- Then there are several standardized tests that help DDX (differential diagnosis) between the 300 some odd psych conditions that all share symptoms... between 500-1500 questions, some general (all psych conditions) some targeted (certain clusters/groupings of similar conditions, or individual severity scales). They not only test for different disorders/conditions, but also check for lying, exaggerating, minimizing, and several other tendencies within the test itself (so very very different than the little internet quizzes of 5/25/50 questions!)... but the results on those tests aren’t complete in and of themselves. (For example someone who’s child is dying of cancer, or a doctor? May score just as high on medical anxiety as someone with hypochondria, or medical trauma. But those are 4 very different things. Or a person can test super high for potential alcoholism, but only drink half a glass of wine twice a year... in a family whose religion doesn’t allow alcohol. Just because people are telling them to stop drinking, and that they’re concerned about their drinking, etc.? Doesn’t make them an alcoholic. Context matters, and the tests are designed in such a way as to allow for that. The test flags certain areas for the evaluator to discuss in detail with the person taking it, and the values are altered based on their determination of circumstance/context.)
- THEN there’s the diagnostitician’s best judgement, on top of those two things. How that works varies rather seriously. Many clinicians will refuse to officially diagnose someone without working with them for several months, including not just therapy but also things like med trials and evaluating both symptoms and expression, and several other things. Others are perfectly comfortable with written statements and questionnaires from people in all areas of a person’s life... family, friends, coworkers, teachers, etc. Whilst others want 24hr observation for some period of time, often several days.
So (ideally) it’s a combo of medical, objective/subjective testing, and subjective evaluation.
Of course, there are also doctors -usually medical doctors, with no specialized training in psych or psychiatry- who will meet with you for 15 minutes, run no testing or differential diagnosis of any kind, and slap a diagnosis on you... but those ones are the most likely to be incorrect.