Table 1.

Participant characteristics.

Group	ID	Sex	Age	Race/ethnicity	Education	Weekly income	Cigs/day	Years smoked	CO	FTND	Kilometers from clinic
1	C30	F	50	White	Some college	$501–600	18	29	23	4	64
	M39	M	49	White	College graduate	$501–600	28	15	23	9	8
	K43	M	22	Asian	Graduate school	<$100	18	3	12	7	5
2	M48	M	21	Hispanic	Some college	$100–200	20	6	34	5	5
	K59	F	20	White	Some college	$201–300	20	3	11	4	3
	B60	M	29	White	Graduate school	$401–500	20	9	21	5	5
3	J25	M	37	White	Some college	<$100	12	22	20	6	5
	K27	M	27	White	Some college	$100–200	10	10	19	3	64
	E33	M	24	White	Some college	$301–400	12	6	19	2	5
4	D63	F	50	White	Some college	$501–600	10	28	14	3	6
	E66	F	19	White	Some college	$100–200	20	4	13	7	3
5	T47	M	38	White	GED	<$100	40	22	45	5	38
	S45	M	45	Black	Some college	$100–200	12	28	15	4	3

Note: ID = participant identification code. CO = breath carbon monoxide level at intake (ppm). Kilometers from clinic = distance from participant’s residence to University of Florida Smoking Lab and Clinic, Gainesville, FL.