This is an educational talk/presentation on the science of diagnostic tests using examples from psychiatry. It was first presented for MRCPsych (Royal College of Psychiatrists UK) June 2008. Now updated in 2009...see newer version
6. Why Is a HADS score not a diagnosis?
1. No core features
2. No symptom ranking
3. No functional assessment
4. Duration unclear
5. What if Missing items?
6. Imprecise