title: A probabilistic risk assessment approach used to prioritize chemical constituents in mainstream smoke of cigarettes sold in China.
abstract: The chemical and physical complexity of cigarette mainstream smoke (MSS) presents a challenge in the understanding of risk for smoking-related diseases. Quantitative risk assessment is a useful tool for assessing the toxicological risks that may be presented by smoking currently available commercial cigarettes. In this study, yields of a selected group of chemical constituents were quantified in machine-generated MSS from 30 brands of cigarettes sold in China. Using constituent yields, exposure estimates specific to and representative of the Chinese population, and available dose-response data, a Monte Carlo method was applied to simulate probability distributions for incremental lifetime cancer risk (ILCR), hazard quotient (HQ), and margin of exposure (MOE) values for each constituent as appropriate. Measures of central tendency were extracted from the outcome distributions and constituents were ranked according to these three risk assessment indices. The constituents for which ILCR >10(-4), HQ >1, and MOE <10,000 included acetaldehyde, acrylonitrile, benzene, cadmium, formaldehyde, and pyridine. While limitations exist to this methodology in estimating the absolute magnitude of health risk contributed by each MSS constituent, this approach provides a plausible and objective framework for the prioritization of toxicants in cigarette smoke and is valuable in guiding tobacco risk management.
authors.affiliation: Zhengzhou Tobacco Research Institute, Zhengzhou 450001, China.
authors.forename: Jianping
authors.initials: J
authors.lastname: Xie
authors.forename: Kristin M
authors.initials: KM
authors.lastname: Marano
authors.forename: Cody L
authors.initials: CL
authors.lastname: Wilson
authors.forename: Huimin
authors.initials: H
authors.lastname: Liu
authors.forename: Huamin
authors.initials: H
authors.lastname: Gan
authors.forename: Fuwei
authors.initials: F
authors.lastname: Xie
authors.forename: Ziad S
authors.initials: ZS
authors.lastname: Naufal
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002681:China; D004305:Dose-Response Relationship, Drug; D006801:Humans; D008875:Middle Aged; D009369:Neoplasms / Q000209:etiology; D018570:Risk Assessment; D012906:Smoke / Q000009:adverse effects* / Q000032:analysis*; D014026:Nicotiana
chemical_list: D012906:Smoke