Table 2.

Differences in mean levels of cotinine, thiocyanate, and total NNAL levels by cigarette type

		Blacks					Whites					All Subjects
Metabolite	N	Menthol	N	Non-menthol	P-value	N	Menthol	N	Non-menthol	P-value	N	Menthol	N	Non-menthol	P-value
Plasma cotinine(ng/ml)	186	389±261	31	348±261	0.09	69	323±220	195	328±248	0.56	255	371±252	226	330±249	0.49
Urinary Cotinine (μg)	194	4418±42	30	4206±38	0.19	76	3807±39	200	4191±46	0.51	270	4246±41	230	4193±45	0.97
		29		99			08		29			43		32
SCN (μm/L)	168	162±48	93	155±49	0.33	59	176±47	165	169±50	0.97	227	166±48	193	167±50	0.34
NNAL+NNAL-Gluc (pmol/mg creatinine)	50	3.0±2.3	11	3.2±1.4	0.43	17	2.7±1.3	69	3.2±2.3	0.44	67	2.9±2.1	80	3.2±2.2	0.23

P-values adjusted for age, BMI, cigarettes per day², race, and sex (all subject models).