Our findings indicate that manufacturers complied with the EC's recent mandated yield reduction primarily by increasing filter ventilation rates on cigarettes-a design feature that promotes compensatory smoking. NA=CO yields were not available in LGC report. ISO=International Organization for Standardization. Table 1Ĭhanges in ISO yields and ventilation for selected “full flavour” brands, United Kingdom, 1999-2005 Brand None of the other design features measured showed consistent changes. Median ventilation increased by 479% (P < 0.006) from 1999 to 2005. Carbon monoxide yields also dropped significantly, from a median of 13 mg to 10 mg (P < 0.01). Originally rated at 11-13 mg tar (median 12 mg), all brands dropped to 10 mg tar (17% drop, P 0.45). The table shows yields and filter ventilation for each brand. Wilcoxon tests assessed average changes across brands. ISO tar, nicotine, and CO yields were obtained from packs (1999 CO values are from LGC 5). The 1999 brand versions had been stored unopened at room temperature since purchase current versions were purchased in September 2005.įull details of methods and data are available on the web (Filter ventilation was assessed using a KC-3 digital apparatus (Borgwaldt-KC, Richmond, VA, USA) following a published protocol. Researchers at Roswell Park Cancer Institute performed analyses in September-October 2005. This article has been cited by other articles in PMC.
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