Table 1.

Demographics and Clinical Characteristics^a

Category	Quitb	Not Quitb	P Valuec
Total sample (N = 144)	62 (43)	82 (57)	NA
Age, y	56.3 (11.0)	55.3 (9.0)	.58
BDI score, (n = 70)	5.2 (3.8)	5.5 (4.6)	.79
Carbon monoxide level, ppm (n = 52)	9.7 (5.0)	14.8 (7.7)	.03*
No. of cigarettes/d	15.6 (6.7)	17.3 (9.6)	.24
No. of weeks in treatment	13.1(11.0)	10.3 (10.3)	.11
No. of sessions attended	7.8 (4.8)	6.7 (5.2)	.19
FTND score (n = 71)	5.5 (1.7)	5.3 (2.0)	.79
White	21 (34)	31 (38)	.82
Male	56 (90)	80 (98)	.13
Psychiatric/SUD history
Any SUD	36 (58)	64 (78)	.01*
Alcohol	13 (21)	29 (35)	.07
Cocaine	6 (10)	21 (26)	.02*
Opiate	9 (15)	4 (5)	.08
Methamphetamine	2 (3)	7 (9)	.3
Multiple SUDs	5 (8)	4 (5)	.5
Posttraumatic stress disorder	16 (26)	23 (28)	.85
Psychosis	11 (18)	15 (18)	1
Depression	19 (31)	30 (37)	.48
Bipolar disorder	10 (16)	12 (15)	.82
Medical history
Cardiac	8 (13)	8 (10)	.6
Diabetes mellitus	18 (29)	9 (11)	.01*
Hypertension	36 (58)	45 (55)	.74
Liver disease	8 (13)	6 (7)	.27
Lung disease	14 (23)	25 (30)	.35
Back pain	30 (48)	32 (39)	.31
Adjunctive medications
Antidepressants	14 (23)	39 (48)	.003*
Antipsychotics	16 (26)	29 (35)	.28
Mood stabilizers	7 (11)	6 (7)	.56
Opiates	17 (27)	16 (20)	.36
Sedatives	4 (6)	5 (6)	1
Nicotine replacement therapy	49 (79)	59 (72)	.44
Bupropion	11 (18)	25 (30)	.12
Varenicline	13 (21)	10 (12)	.07

^aListed statistical contrasts are uncorrected for multiple comparisons.

^bValues reported as n (%) for categorical variables and as mean (SD) for continuous variables.

^cAnalysis of variance was used for continuous variables, and the Fisher exact test was used for categorical variables.

^*P values indicating a statistically significant comparison.

Abbreviations: BDI = Beck Depression Inventory, FTND = Fagerström Test for Nicotine Dependence, NA = not applicable, SUD = substance use disorder.