Table 2.

Regression Analysis of Necessity and Harmfulness Beliefs

Dependent Variable	Independent Variable	β	P Value^a
HAM-D17 = 17-item Hamilton Rating Scale for Depression.
^a All effects are adjusted for correlation due to clustering of patients within clinics.
^b Total R² = .30.
^c Retained because this variable did not meet removal criterion of P =.10 in second block.
^d Total R² = .13.
Necessity belief^b	Age	.27	<.001
	Sex	−.06	.34
	Years of education	−.05	.65
	Depressive symptom severity (HAM-D17 total score)	.17	.03
	Number of prior episodes	.12	.09^c
	Belief that symptoms will last a long time	.26	.001
	Belief that symptoms were caused by a chemical imbalance	.22	.005
Harmfulness belief^d	Age	.00	.99
	Sex	.00	.99
	Years of education	.03	.69
	History of antidepressant use	−.17	.02
	Belief that symptoms were randomly caused	.21	.04
	Subjective poor understanding of symptoms	.19	.003