ICD-10 and DSM V Flashcards
What do classification systems describe?
They describe clusters of symptoms that define disorders. This should lead to better quality diagnosis.
International Classification of Diseases (ICD-10)
- Published by WHO
- Considers each disorder as being part of a family.
Coding of ICD-10
- Coded F for section of the system followed by a digit for the family of the disorder.
e.g. F32 is depression, F31 is bipolar depression, F32.0 is mild depression. - Decimal points make categorisation even more specific.
- Use to guide diagnosis through interview.
DSM-V Diagnostic Criteria
- Needs 2+ of Delusions (1), hallucinations (2), disorganised speech (3), grossly organised, negative symptoms.
- Lasts for a significant portion of a 1 month period. Has to be at least one of (1,2,3).
- For a significant portion, the level of functioning in work, self care, etc must be below level achieved prior to symptoms.
- Continuous disturbance for at least 6 months, at least one month of symptoms. Have to rule out schizoaffective disorder/bipolar depression.
- Rule out drug use and autism.
Reliability of Diagnosis
Reliable if more than one psychiatrist gives same diagnosis (inter-rater reliability).
Unreliable diagnosis means likely incorrect treatment.
Validity of Diagnosis
Extent to which a diagnosis genuinely reflects the underlying disorder.
ICD-10 Diagnostic Criteria
- At least one very clear symptom belonging to a-d group. Or at least 2 from e-h.
- Clearly present for one month or more.
- Can’t be diagnosed with Schizo if any evidence of depressive episode.
Patient Factors
Give inaccurate info (because of memory, denial, shame, etc).
Specific issues like disorganised thoughts.
Clinician Factors
Focus on certain symptom presentation because of the unstructured nature of interview.
Subjective judgement (background, experience, training of clinician).
