TABLE 3.

Pearson correlation coefficients between tobacco dependence, cigarette consumption, and tobacco biomarkers in Black and White smokers by tobacco dependence

Variable	Group	NNAL	Total PAH	NEq	Urine COT	Plasma COT
FTND	Black smokers
	low dependence	−0.15	−0.21	−0.20	0.04	0.08
	high dependence	−0.07	0.16	−0.01	−0.20	−0.05
	White smokers
	low dependence	0.52	0.41	0.46	0.20	0.16
	high dependence	0.16	0.25	0.30	0.26	0.27
TFC	Black smokers
	low dependence	0.09	0.00	−0.10	−0.10	−0.04
	high dependence	−0.02	−0.21	−0.02	−0.01	−0.15
	White smokers
	low dependence	−0.34	−0.31	−0.35	−0.30	−0.25
	high dependence	−0.11	−0.14	−0.13	−0.05	−0.25
CPD	Black smokers
	low dependence	−0.03	0.03	−0.25	−0.19	−0.09
	high dependence	−0.12	0.1	0.02	0.16	0.15
	White smokers
	low dependence	0.33	0.38	0.36	0.21	0.38
	high dependence	0.14	0.12	0.18	−0.05	0.22
NEq	Black smokers
	low dependence	0.77	0.61	1	0.69	0.76
	high dependence	0.39	0.73	1	0.68	0.72
	White smokers
	low dependence	0.63	0.64	1	0.78	0.74
	high dependence	0.61	0.59	1	0.72	0.57

NOTGES: Tobacco dependence was measured by time to first cigarette (TFC) (median = 15 min); low tobacco dependence = TFC >15 min; high tobacco dependence = TFC ≤ 15 min; Black, low dependence, n = 28; Black, high dependence, n = 41; White, low dependence, n = 57; White, high dependence, n = 78; NNAL = 4-(methylnitrosamino)-1-(3)pyridyl-1-butanol; total PAH = polycyclic aromatic hydrocarbon metabolites; NEq = nicotine equivalent; CPD = cigarettes per day; Fluor is molar sum of 1-, 2-, and 3-fluorenols; COT is cotinine; all biomarker data were log₁₀-transformed; significant correlations are in bold.