Table 1.

Baseline characteristics by clusters identified by k-means.

	C>P& N = 212		P>C^ N = 145
Variable	Mean or N	SD or %	Mean or N	SD or %	p-value
Age	45.86	10.42	45.83	10.35	0.980
Male	126	60	88	60.69	0.896
Race
AA *	99	46.7	69	47.59	0.857
White	105	49.53	69	47.59
Other	8	3.77	7	4.83
FTND $	4.65	2.02	4.71	2.15	0.815
CES-D #	9.95	7.54	9.82	8.62	0.882

^&larger brain responses to cigarette-related cues than non-nicotine-related pleasant stimuli;

^{^}larger brain responses to non-nicotine-related pleasant stimuli than cigarette-related cues;

^*African American;

^$Fagerstrom Test for Nicotine Dependence;

^#Depression (Center for Epidemiologic Studies Depression Scale)