Association between exposure to secondhand aerosol from heated tobacco products and respiratory symptoms among current non-smokers in Japan: a cross-sectional study

Objectives To investigate the association between secondhand-aerosol exposure from heated tobacco products (HTPs) and respiratory symptoms among current non-smokers.Design Cross-sectional study.Setting Internet survey conducted between 8 and 26 February 2021 in Japan.Participants Non-smoking respond...

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Main Authors: Takahiro Tabuchi, Sumiyo Okawa, Takashi Yoshioka, Tomohiro Shinozaki, Kei Nakashima, Ai Hori
Format: Article
Language:English
Published: BMJ Publishing Group 2023-03-01
Series:BMJ Open
Online Access:https://bmjopen.bmj.com/content/13/3/e065322.full
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author Takahiro Tabuchi
Sumiyo Okawa
Takashi Yoshioka
Tomohiro Shinozaki
Kei Nakashima
Ai Hori
author_facet Takahiro Tabuchi
Sumiyo Okawa
Takashi Yoshioka
Tomohiro Shinozaki
Kei Nakashima
Ai Hori
author_sort Takahiro Tabuchi
collection DOAJ
description Objectives To investigate the association between secondhand-aerosol exposure from heated tobacco products (HTPs) and respiratory symptoms among current non-smokers.Design Cross-sectional study.Setting Internet survey conducted between 8 and 26 February 2021 in Japan.Participants Non-smoking respondents at the survey aged 15–80 years.Exposure Self-reported secondhand-aerosol exposure.Primary and secondary outcomes We defined asthma/asthma-like symptoms as a primary outcome and persistent cough as a secondary outcome. We examined the association between secondhand-aerosol exposure from HTPs and respiratory symptoms (asthma attacks/asthma-like symptoms and persistent cough). The prevalence ratio (PR) and 95% CI were calculated by using weighted, multivariable ‘modified’ Poisson regression models.Results Of the 18 839 current non-smokers, 9.8% (95% CI 8.2% to 11.7%) and 16.7% (95% CI 14.8% to 18.9%) of those who were exposed to secondhand aerosols reported asthma attacks/asthma-like symptoms and persistent cough, whereas 4.5% (95% CI 3.9% to 5.2%) and 9.6% (95% CI 8.4% to 11.0%) of those who were not, respectively. Secondhand-aerosol exposure was associated with respiratory symptoms (asthma attacks/asthma-like symptoms: PR 1.49, 95% CI 1.21 to 1.85; persistent cough: PR 1.44, 95% CI 1.21 to 1.72) after adjusting for covariates.Conclusion Secondhand-aerosol exposure from HTPs was associated with both asthma attacks/asthma-like symptoms and persistent cough. These results provide policymakers with meaningful information in the regulation of HTP use for the protection of current non-smokers.
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spelling doaj.art-fce0ddb7f17f4f2eb428d510cd18d1642023-08-11T17:10:07ZengBMJ Publishing GroupBMJ Open2044-60552023-03-0113310.1136/bmjopen-2022-065322Association between exposure to secondhand aerosol from heated tobacco products and respiratory symptoms among current non-smokers in Japan: a cross-sectional studyTakahiro Tabuchi0Sumiyo Okawa1Takashi Yoshioka2Tomohiro Shinozaki3Kei Nakashima4Ai Hori5Cancer Control Center, Osaka International Cancer Institute, Osaka, JapanInstitute for Global Health Policy Research, Bureau of International Health Cooperation, National Center for Global Health and Medicine Hospital, Shinjuku-ku, Tokyo, JapanDepartment of Preventive Medicine and Public Health, Keio University School of Medicine, Shinjuku-ku, Tokyo, JapanDepartment of Information and Computer Technology, Faculty of Engineering, Tokyo University of Science, Katushika-ku, Tokyo, JapanDepartment of Pulmonology, Kameda Medical Center, Kamogawa-shi, Chiba, JapanDepartment of Global Public Health, University of Tsukuba, Tsukuba-shi, Ibaraki, JapanObjectives To investigate the association between secondhand-aerosol exposure from heated tobacco products (HTPs) and respiratory symptoms among current non-smokers.Design Cross-sectional study.Setting Internet survey conducted between 8 and 26 February 2021 in Japan.Participants Non-smoking respondents at the survey aged 15–80 years.Exposure Self-reported secondhand-aerosol exposure.Primary and secondary outcomes We defined asthma/asthma-like symptoms as a primary outcome and persistent cough as a secondary outcome. We examined the association between secondhand-aerosol exposure from HTPs and respiratory symptoms (asthma attacks/asthma-like symptoms and persistent cough). The prevalence ratio (PR) and 95% CI were calculated by using weighted, multivariable ‘modified’ Poisson regression models.Results Of the 18 839 current non-smokers, 9.8% (95% CI 8.2% to 11.7%) and 16.7% (95% CI 14.8% to 18.9%) of those who were exposed to secondhand aerosols reported asthma attacks/asthma-like symptoms and persistent cough, whereas 4.5% (95% CI 3.9% to 5.2%) and 9.6% (95% CI 8.4% to 11.0%) of those who were not, respectively. Secondhand-aerosol exposure was associated with respiratory symptoms (asthma attacks/asthma-like symptoms: PR 1.49, 95% CI 1.21 to 1.85; persistent cough: PR 1.44, 95% CI 1.21 to 1.72) after adjusting for covariates.Conclusion Secondhand-aerosol exposure from HTPs was associated with both asthma attacks/asthma-like symptoms and persistent cough. These results provide policymakers with meaningful information in the regulation of HTP use for the protection of current non-smokers.https://bmjopen.bmj.com/content/13/3/e065322.full
spellingShingle Takahiro Tabuchi
Sumiyo Okawa
Takashi Yoshioka
Tomohiro Shinozaki
Kei Nakashima
Ai Hori
Association between exposure to secondhand aerosol from heated tobacco products and respiratory symptoms among current non-smokers in Japan: a cross-sectional study
BMJ Open
title Association between exposure to secondhand aerosol from heated tobacco products and respiratory symptoms among current non-smokers in Japan: a cross-sectional study
title_full Association between exposure to secondhand aerosol from heated tobacco products and respiratory symptoms among current non-smokers in Japan: a cross-sectional study
title_fullStr Association between exposure to secondhand aerosol from heated tobacco products and respiratory symptoms among current non-smokers in Japan: a cross-sectional study
title_full_unstemmed Association between exposure to secondhand aerosol from heated tobacco products and respiratory symptoms among current non-smokers in Japan: a cross-sectional study
title_short Association between exposure to secondhand aerosol from heated tobacco products and respiratory symptoms among current non-smokers in Japan: a cross-sectional study
title_sort association between exposure to secondhand aerosol from heated tobacco products and respiratory symptoms among current non smokers in japan a cross sectional study
url https://bmjopen.bmj.com/content/13/3/e065322.full
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