{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T04:44:23Z","timestamp":1779338663247,"version":"3.51.4"},"reference-count":26,"publisher":"BMJ","issue":"4","funder":[{"DOI":"10.13039\/100000054","name":"National Cancer Institute","doi-asserted-by":"publisher","award":["P01 CA217806"],"award-info":[{"award-number":["P01 CA217806"]}],"id":[{"id":"10.13039\/100000054","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000054","name":"National Cancer Institute","doi-asserted-by":"publisher","award":["R01 CA179246"],"award-info":[{"award-number":["R01 CA179246"]}],"id":[{"id":"10.13039\/100000054","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100006545","name":"National Institute on Minority Health and Health Disparities","doi-asserted-by":"publisher","award":["K01MD014795"],"award-info":[{"award-number":["K01MD014795"]}],"id":[{"id":"10.13039\/100006545","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100006108","name":"National Center for Advancing Translational Sciences","doi-asserted-by":"publisher","award":["UL1TR002494"],"award-info":[{"award-number":["UL1TR002494"]}],"id":[{"id":"10.13039\/100006108","id-type":"DOI","asserted-by":"publisher"}]},{"name":"NIH","award":["P30 CA77598"],"award-info":[{"award-number":["P30 CA77598"]}]}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["Tob Control"],"accepted":{"date-parts":[[2023,1,10]]},"published-print":{"date-parts":[[2024,7]]},"abstract":"<jats:sec>\n<jats:title>Background<\/jats:title>\n<jats:p>Regulation of filter ventilation (FV) has been proposed to reduce misperceptions that ventilation reduces the health risks of smoking. We describe smoking behaviour and exposure after switching to a cigarette brand variant (CBV) with a different FV level.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Methods<\/jats:title>\n<jats:p>\nWave 1 (2013\u20132014) of the Population Assessment of Tobacco Use and Health Study was merged with FV levels of participants\u2019 CBV and restricted to adults with a usual CBV, smoked daily and included in wave 4 (2016\u20132017; n=371). Generalised estimation equations method modelled changes in FV and cigarettes per day (CPD), quit interest, total nicotine equivalents (TNE) and total NNAL (biomarker of a tobacco-specific carcinogen). FV change was defined as a change in CBV resulting in a \u226520% increase or decrease in FV. Secondary analyses used FV change based on an\n<jats:italic>increase<\/jats:italic>\nfrom &lt;5%\u2009to &gt;10%\u2009or a\n<jats:italic>decrease<\/jats:italic>\nfrom &gt;10%\u2009to &lt;5%.\n<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Results<\/jats:title>\n<jats:p>A non-significant pattern indicating an increase of 0.97 and 0.49 CPD was observed among those who switched to a CBV and increased FV by \u226520%\u2009and from &lt;5%\u2009to &gt;10%, respectively. A non-significant pattern indicating a decrease of 1.31 and 1.97 CPD was observed among those who decreased FV by \u226520%\u2009and from &gt;10%\u2009to &lt;5%, respectively. Changes in quit interest and biomarkers were also non-significant with one exception: greater reduction in TNE among those who decreased from &gt;10%\u2009to &lt;5%\u2009FV versus no change (\u22128.51 vs \u22120.25\u2009nmol\/mg creatinine; p=0.0447).<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Conclusions<\/jats:title>\n<jats:p>Switching to CBV with lower FV does not appear to increase exposure and may even reduce exposure for some. Additional investigations are recommended to confirm these descriptive findings.<\/jats:p>\n<\/jats:sec>","DOI":"10.1136\/tc-2022-057571","type":"journal-article","created":{"date-parts":[[2023,1,23]],"date-time":"2023-01-23T18:21:31Z","timestamp":1674498091000},"page":"541-544","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Switching to cigarette brand variants with different filter ventilation levels: a descriptive analysis"],"prefix":"10.1136","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4334-9515","authenticated-orcid":false,"given":"Dana Mowls","family":"Carroll","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Katelyn","family":"Tessier","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xianghua","family":"Luo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5140-8944","authenticated-orcid":false,"given":"Irina S","family":"Stepanov","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter G","family":"Shields","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0644-182X","authenticated-orcid":false,"given":"Richard","family":"O'Connor","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9939-6740","authenticated-orcid":false,"given":"Vaughan W","family":"Rees","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7103-7017","authenticated-orcid":false,"given":"Michael","family":"Cummings","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Warren","family":"Bickel","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1108-2609","authenticated-orcid":false,"given":"Dorothy","family":"Hatsukami","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2023,1,23]]},"reference":[{"key":"2024072401151141000_33.4.541.1","unstructured":"U.S. Department of Health and . 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