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Article: Cigarettes, heated tobacco products and dual use: exhaled carbon monoxide, saliva cotinine and total tobacco consumed by Hong Kong tobacco users

TitleCigarettes, heated tobacco products and dual use: exhaled carbon monoxide, saliva cotinine and total tobacco consumed by Hong Kong tobacco users
Authors
Issue Date24-Jan-2023
PublisherBMJ Publishing Group
Citation
Tobacco Control, 2023 How to Cite?
Abstract

Background: Independent studies on exhaled carbon monoxide (CO) and saliva cotinine levels in regular heated tobacco product (HTP) users, and how they compare with conventional cigarette (CC) smokers, are lacking.

Methods: A total of 3294 current users of CCs, HTPs or electronic cigarettes (ECs) from a household survey and a smoking hotspot survey were classified into seven groups: exclusive users of CCs, HTPs, ECs; dual users of CCs and HTPs, CCs and ECs, HTPs and ECs; and triple users. We measured exhaled CO level using the piCo Smokerlyzer (n=780) and saliva cotinine using NicAlert cotinine test strips (n=620). Among the seven groups, the differences in (1) CO and cotinine levels were examined using Kruskal-Wallis test, and (2) the average daily tobacco consumption in the past 30 days was examined using multivariable linear regression.

Results: Both exclusive and dual users of CCs had a higher CO level than exclusive HTP or EC users (p<0.05). Exhaled CO levels were similar between HTP and EC users, as were saliva cotinine levels among the seven groups. Compared with exclusive CC users, those who also used HTPs or ECs smoked fewer CCs (CCs+HTPs: adjusted coefficient -2.79, 95% CI -3.90 to -1.69; CCs+ECs: -1.34, 95% CI -2.34 to -0.34), but consumed more tobacco sticks equivalent in total (2.79 (95% CI 1.61 to 3.96); 1.95 (95% CI 0.79 to 3.12)).

Conclusions: HTP or EC use showed lower exhaled CO but similar saliva cotinine levels compared with CC use. Dual users of CCs and HTPs/ECs smoked fewer CCs than exclusive CC users, but consumed more tobacco in total.


Persistent Identifierhttp://hdl.handle.net/10722/328486
ISSN
2023 Impact Factor: 4.0
2023 SCImago Journal Rankings: 1.654
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhang, XY-
dc.contributor.authorSun, YY-
dc.contributor.authorCheung, YTD-
dc.contributor.authorWang, MP-
dc.contributor.authorWu, YS-
dc.contributor.authorChak, KY-
dc.contributor.authorChen, JJ-
dc.contributor.authorLeung, LT-
dc.contributor.authorLam, TH-
dc.contributor.authorHo, SY-
dc.date.accessioned2023-06-28T04:45:23Z-
dc.date.available2023-06-28T04:45:23Z-
dc.date.issued2023-01-24-
dc.identifier.citationTobacco Control, 2023-
dc.identifier.issn0964-4563-
dc.identifier.urihttp://hdl.handle.net/10722/328486-
dc.description.abstract<p><strong>Background: </strong>Independent studies on exhaled carbon monoxide (CO) and saliva cotinine levels in regular heated tobacco product (HTP) users, and how they compare with conventional cigarette (CC) smokers, are lacking.</p><p><strong>Methods: </strong>A total of 3294 current users of CCs, HTPs or electronic cigarettes (ECs) from a household survey and a smoking hotspot survey were classified into seven groups: exclusive users of CCs, HTPs, ECs; dual users of CCs and HTPs, CCs and ECs, HTPs and ECs; and triple users. We measured exhaled CO level using the piCo Smokerlyzer (n=780) and saliva cotinine using NicAlert cotinine test strips (n=620). Among the seven groups, the differences in (1) CO and cotinine levels were examined using Kruskal-Wallis test, and (2) the average daily tobacco consumption in the past 30 days was examined using multivariable linear regression.</p><p><strong>Results: </strong>Both exclusive and dual users of CCs had a higher CO level than exclusive HTP or EC users (p<0.05). Exhaled CO levels were similar between HTP and EC users, as were saliva cotinine levels among the seven groups. Compared with exclusive CC users, those who also used HTPs or ECs smoked fewer CCs (CCs+HTPs: adjusted coefficient -2.79, 95% CI -3.90 to -1.69; CCs+ECs: -1.34, 95% CI -2.34 to -0.34), but consumed more tobacco sticks equivalent in total (2.79 (95% CI 1.61 to 3.96); 1.95 (95% CI 0.79 to 3.12)).</p><p><strong>Conclusions: </strong>HTP or EC use showed lower exhaled CO but similar saliva cotinine levels compared with CC use. Dual users of CCs and HTPs/ECs smoked fewer CCs than exclusive CC users, but consumed more tobacco in total.</p>-
dc.languageeng-
dc.publisherBMJ Publishing Group-
dc.relation.ispartofTobacco Control-
dc.titleCigarettes, heated tobacco products and dual use: exhaled carbon monoxide, saliva cotinine and total tobacco consumed by Hong Kong tobacco users-
dc.typeArticle-
dc.identifier.doi10.1136/tc-2022-057598-
dc.identifier.eissn1468-3318-
dc.identifier.isiWOS:000919265300001-
dc.identifier.issnl0964-4563-

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