4. Number, Percent Detected, and Range of Urine Metabolite Concentrations in Non-Smokers and Smoke-Exposed in the Marietta Cohort.

Parent chemical/metabolite, ng/mL	Marietta nonsmokers (n = 13), n (%), range	Mmarietta smoke-exposed (n = 7), n (%), range
vinyl chloride, ethylene oxide, and acrylonitrile/HEMA	0 (0), ND	0 (0), ND
acrolein/3HPMA	12 (92), ND - 95.8	7 (100), 36.3–206.9
acrolein/CEMA	12 (92), ND - 123.8	7 (100), 18.5–191.0
benzene/PMA	1 (8), ND - 10	0 (0), ND
toluene/BMA	13 (100), 1–68	7 (100), 2–55
ethylbenzene and styrene/PGA	13 (100), 11.0–599.9	7 (100), 29.9–213.2
xylene/MHA	13 (100), 5.2–160.6	7 (100), 23.3–266.9

ND: not detected.