Table 3.

Summary of hierarchical regression analysis predicting level of OCD symptoms at treatment end from pre-treatment variables.

Variable	B	SE B	β	R
Step 1				.45
YBOCS	.41	.11	.45**
Step 2 (Stepwise)1				.53
YBOCS	.49	.11	.55**
OBQ Perf/Int	−.08	.03	−.30*

Note.¹ Variables in Step 2 were all at pre-treatment: YBOCS = Yale Brown Obsessive Compulsive Scale Total; OBQ Perf/Int = Obsessional Belief Questionnaire: Perfectionism and Intolerance of Uncertainty. R² = .20 for step 1 (p < .001); R² = .28 for step 2 (p = .015).

^**p < .001;

^*p < .01.