Table 3.

Hierarchical linear regressions of social anxiety predicting cessation-related problems, perceived barriers to quitting, and negative affect reduction expectancies

		⊗R2	®	t	p	sr2
DV: Severity of cessation-related problems
Step 1		.215			<.001
	Sex		0.28	5.86	.000	0.08
	Cigarettes per day		0.08	1.74	.083	0.01
	Alcohol frequency		0.03	0.66	.511	0.00
	Lifetime cannabis use status		0.05	0.98	.329	0.00
	Panic attacks		0.05	1.00	.317	0.00
	Negative affectivity		0.17	2.89	.004	0.02
	Anxiety sensitivity		0.19	3.24	.001	0.02
Step 2		.023			.001
	Social anxiety		0.19	3.27	.001	0.02
DV: Perceived barriers to quitting
Step 1		.243			<.001
	Sex		0.25	5.25	.000	0.06
	Cigarettes per day		0.12	2.58	.010	0.01
	Alcohol frequency		0.08	1.76	.079	0.01
	Lifetime cannabis use status		0.12	2.56	.011	0.01
	Panic attacks		−0.04	−0.72	.475	0.00
	Negative affectivity		0.25	4.43	.000	0.04
	Anxiety sensitivity		0.18	3.15	.002	0.02
Step 2		.014			.010
	Social anxiety		0.15	2.59	.010	0.01
DV: Negative affect reduction expectancies
Step 1		.181			<.001
	Sex		0.19	3.81	.000	0.03
	Cigarettes per day		0.12	2.49	.013	0.01
	Alcohol frequency		0.07	1.50	.134	0.01
	Lifetime cannabis use status		0.10	2.13	.034	0.01
	Panic attacks		−0.06	−1.20	.230	0.00
	Negative affectivity		0.29	4.83	.000	0.05
	Anxiety sensitivity		0.09	1.51	.131	0.01
Step 2		.012			.021
	Social anxiety		0.14	2.31	.021	0.01