Table II.

Spearman’s correlation coefficients between cigarette smoking and urinary biomarkers of tobacco smoke constituents among current smokers (392 control subjects only), The Shanghai Cohort Study 1986–2007^a

	Total cotinineb	Total NNALc	PheT	MHBMA	HEMA	SPMA	HPMA	HBMA
No. of cigarettes per day	0.37	0.26	0.09	0.21	0.23	0.16	0.33	0.35
Total cotinineb		0.45	0.23	0.43	0.49	0.34	0.50	0.52
Total NNALc			0.24	0.26	0.26	0.15	0.25	0.24
PheT				0.25	0.21	0.26	0.17	0.18
MHBMA					0.53	0.67	0.43	0.38
HEMA						0.56	0.64	0.64
SPMA							0.45	0.46
HPMA								0.83

^aAll P’s <0.003 except for the coefficient between number of cigarettes per day and PheT (P = 0.074).

^bFour control subjects with missing total cotinine were excluded from these analyses.

^cTen control subjects with missing total NNAL values were excluded from these analyses.