Tests
1st tests to order
no initial test
Test
Typically, in clinical settings, the diagnosis is determined by unstructured clinical interviewing and reviewing DSM-5-TR criteria.
Result
clinical diagnosis
Tests to consider
Structured Clinical Interview for the DSM (SCID)
Test
The SCID is a structured instrument that can be used to determine whether or not a patient meets DSM criteria for OCD. The current version (SCID-5) is based on DSM-5. It is not necessary in most cases and is largely used in research settings.[35]
Result
patient meets DSM criteria for OCD
Yale-Brown Obsessive-Compulsive Scale (Y-BOCS)
Test
Y-BOCS is not a diagnostic tool, but a reliable measure of symptom severity. Should be administered at the start of treatment and periodically (every 6 months) in order to track treatment progress.[37]
0 to 7: subclinical/asymptomatic
8 to 15: mild symptoms
16 to 23: moderate symptoms
24 to 31: severe symptoms
32 to 40: extremely severe
Result
OCD symptom severity scale 0 to 40
Clinical Global Impression (CGI)
Test
The response format for the CGI is:
0: not assessed
1: normal, not at all ill
2: borderline mentally ill
3: mildly ill
4: moderately ill
5: markedly ill
6: severely ill
7: among the most extremely ill patients.
Result
severity scale 1 to 7
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