Appendix Table A.

Clinically Significant Insomnia Scores (ISI > 14) on IDQ-S Subscales

	IDQ-Sc –Lack of Cognitive Coping			IDQ-Sc –Withdrawal Intolerance
Variable	β	t	p	β	t	p
Gender	−.009	−.127	.899	−.155	−2.464	.015
Age	.002	.030	.976	−.110	−1.773	.078
Race	−.031	−.454	.650	−.071	−1.139	.256
HSIa	.136	1.955	.052	.202	3.158	.002
DIIb	−.065	−.929	.354	.116	1.810	.072
Clinically significant ISI	−.058	−.837	.403	.220	3.484	.001
R 2		.022			.176
ΔR2		.003			.046
F for ΔR2		.701			12.137**

Note: N = 224. Results shown are from the second step of each linear regression model; p = standardized beta weights; Race: Reference group = white; Gender: Reference group = female; Clinically significant ISI: Reference group = no clinical insomnia

^aHeaviness of Smoking Index

^bDistress Intolerance Index

^cIntolerance for Smoking Abstinence Discomfort Questionnaire

^*p < .05

^**p < .01