Table 1.

Clinical Demographics of Study Subjects

	Smoking status
	Light (L)	Moderate	Heavy (H)	P-value H versus L
Variable	14	13	9	—
Sex (Male/Female)	6/8	10/3	5/4	ns
Age (yrs)	46.71 ± 2.68	47.43 ± 2.39	50.44 ± 3.46	ns
Race (White/Black)	6/8	7/6	4/5	ns
BMI	27.98 ± 0.93	27.61 ± 1.29	29.46 ± 1.33	ns
Cigarettes per day (last 24 h)	8.71 ± 0.67	18.69 ± 0.60	34.11 ± 3.13	<0.0001
Years of smoking	18.93 ± 3.33	30.15 ± 3.56	32.22 ± 4.06	0.02
Pack-years	8.729 ± 1.77	28.55 ± 3.67	57.11 ± 11.45	<0.0001

Mean (±SEM) is shown for continuous variables.

ns, indicates nonsignificant; —, not applicable.

Pack-years = Divide the number of cigarettes per day by 20, then multiply by the number of years smoked.