Yale-Brown Obsessive Compulsive Scale (Y-BOCS)

OCD Severity Rating Test

This is a test to rate the severity of obsessive-compulsive disorder symptoms.

Instructions for Obsession Rating Scale

Rate the average occurence of each item during the prior week up-to-and-including now. Choose only one number per item. Scores are intended to reflect a composite effect of all obsessive compulsive symptoms.

ITEM		RANGE OF SEVERITY
1.	Time Spent on Obsessions	0 hrs/day	0-1 hrs/day	1-3 hrs/day	3-8 hrs/day	8+ hrs/day
	Avg Occurrence	0	1	2	3	4
2.	Interference from Obsessions	None	Mild	Definite but Manageable	Substantial Impairment	Incapacitating
	Avg Occurrence	0	1	2	3	4
3.	Distress from Obsessions	None	Little	Moderate but Manageable	Severe	Near Constant, Disabling
	Avg Occurrence	0	1	2	3	4
4.	Resistance to Obsessions	Always Resists	Much Resistance	Some Resistance	Often Yields	Completely Yields
	Avg Occurrence	0	1	2	3	4
5.	Control Over Obsessions	Complete Control	Much Control	Some Control	Little Control	No Control
	Avg Occurrence	0	1	2	3	4

Compulsion Rating Scale

ITEM		RANGE OF SEVERITY
1.	Time Spent on Compulsions	0 hrs/day	0-1 hrs/day	1-3 hrs/day	3-8 hrs/day	8+ hrs/day
	Avg Occurrence	0	1	2	3	4
2.	Interference from Compulsions	None	Mild	Definite but Manageable	Substantial Impairment	Incapacitating
	Avg Occurrence	0	1	2	3	4
3.	Distress when Resisting Compulsions	None	Little	Moderate but Manageable	Severe	Near Constant, Disabling
	Avg Occurrence	0	1	2	3	4
4.	Resistance to Compulsions	Always Resists	Much Resistance	Some Resistance	Often Yields	Completely Yields
	Avg Occurrence	0	1	2	3	4
5.	Control Over Compulsions	Complete Control	Much Control	Some Control	Little Control	No Control
	Avg Occurrence	0	1	2	3	4

Total Y-BOCS score: range of severity for patients who have both obsessions and compulsions.

0-7 Subclinical
8-15 Mild
16-23 Moderate
24-31 Severe
32-40 Extreme

Credits: WK Goodman et al, "The Yale-Brown Obsessive Compulsive Scale," Arch Gen Psychiatry. 1989; 46:1006-1011.

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