Table 1.

Characteristics of the cases included in this study

	African American N=517	European American N=1141	p Value
Smoking status
Never	36 (7%)	106 (9.4%)	<0.0001
Former	188 (36.6%)	523 (46.3%)
Current	288 (56%)	494 (43.8%)
Missing	2 (0.4%)	6 (0.5%)
Gender
Male	270 (54%)	600 (53%)	0.892
Female	247 (48%)	541 (47%)
Age (mean, range)	63.8 (34–88)	66.2 (26–91)	<0.0001
Pack-years (mean, range)	35.1 (0–185)	44.2 (0–194.2)	<0.0001
Years since quit (mean, range)	5.9 (0–48)	9.0 (0–56)
≤15*	111 (59%)	242 (46%)	<0.0001
>15*	77 (41%)	281 (54%)

*Former smokers only.