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Fig. 2 | Respiratory Research

Fig. 2

From: Association of tobacco product use with chronic obstructive pulmonary disease (COPD) prevalence and incidence in Waves 1 through 5 (2013–2019) of the Population Assessment of Tobacco and Health (PATH) Study

Fig. 2

Unweighted distribution for years of product use (A), cigarette pack-years (B) and years since quit smoking cigarettes (C) at Wave 1 for past 30-day exclusive product users. aOutside values are not plotted. A Years of product use. cUnweighted Ns: exclusive e-cigarette = 176; exclusive cigar = 352; exclusive smokeless = 475; exclusive cigarette = 3,760; exclusive dual cigarette and e-cigarette = 851; polycombusted = 613; polycombusted and noncombusted = 444. B Cigarette pack-years. dUnweighted Ns: former established tobacco = 1920; exclusive e-cigarette = 190; exclusive cigar = 353; exclusive smokeless = 442; exclusive cigarette = 3698; exclusive dual cigarette and e-cigarette = 842; polycombusted = 589; polycombusted and noncombusted = 443. C Years since quit smoking cigarettes. eUnweighted Ns: former established tobacco = 2135; exclusive e-cigarette = 190; exclusive cigar = 326; exclusive smokeless = 370..bFormer established user category includes all established users (e.g., lifetime use of more than 100 cigarettes or ever used other products fairly regularly) who did not use any tobacco products in the past 30 days

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Respiratory Research

ISSN: 1465-993X

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