Table 1.

Baseline demographics and smoking history of subjects by sex. In instances where data are missing, the total number of subjects used in calculating values is fewer than the 235 randomized to treatment.

	Overall		Males		Females		p-value
Age (years)	235	47.0±11.7	99	48.1±11.0	136	46.1±12.1	0.216
Non-Hispanic Whites	191	82.0%	78	79.6	113	83.7	0.420
Education							0.920
8th grade or less	2	0.9%	0	0.0	2	1.5
Some high school	6	2.6%	2	2.0	4	3.0
High school graduate	53	22.8%	23	23.5	30	22.2
Some college/2-year	132	56.7%	55	56.1	77	57.0
College graduate/4-year	32	13.7%	15	15.3	17	12.6
Graduate degree	8	3.4%	3	3.1	5	3.7
Marital Status							0.007
Never Married	63	26.8%	22	22.2	41	30.2
Currently married	91	38.7%	50	50.5	41	30.2
Currently not married	81	34.5%	27	27.3	54	39.7
Cigarettes per day	235	18.9±7.2	99	21.0±9.7	136	18.4±6.8	0.005
Years of Smoking	234	29.1±12.0	98	30.7±11.7	136	28.0±12.1	0.092
Age smoking first cigarette (yrs)	235	14.6±3.9	99	14.2±3.5	136	14.9±4.1	0.154
Age regular smoker (yrs)	234	17.9±4.6	98	17.6±4.5	136	18.2±4.6	0.320
Number of quit attempts							0.296
1–2	51	23.5%	18	20.7	33	25.4
3–5	86	39.6%	31	35.6	55	42.3
6–10	49	22.6%	26	29.9	23	17.7
11–20	24	11.1%	10	11.5	14	10.8
20+	7	3.2%	2	2.3	5	3.9
Motivation to quit (0–10))	224	8.5±1.4	95	8.5±1.5	129	8.5±1.4	0.940
Fagerstrom Test for Nicotine Dependence	228	5.4±1.9	96	5.4±2.0	132	5.3±1.9	0.719
Total TNE (nmol/mg creatinine)	172	59.9±28.3	70	51.7±22.5	102	65.5±30.5	0.005
Total Cotinine (nmol/mg creatinine)	172	20.2±10.6	70	18.7±9.5	102	21.3±11.1	0.183
Total NNAL (pmol/mg creatinine)	170	1.4±0.9	70	1.3±0.8	100	1.5±0.9	0.027