Secondhand Tobacco Exposure Assessed Using Urinary Cotinine Among 10-Year-Old Children in Japan: An 11-Year Repeated Cross-sectional Study.

IF 3 2区医学 Q2 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH Nicotine & Tobacco Research Pub Date : 2025-02-24 DOI:10.1093/ntr/ntae220

Yudai Tamada, Kenji Takeuchi, Takahiro Tabuchi

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Abstract

Introduction: The emergence of heated tobacco products (HTPs) has made it important to monitor HTP-generated aerosols in addition to combustible cigarette (CC) smoke as a source of secondhand tobacco (SHT) exposure. We investigated the trend of SHT exposure in school-aged children and assessed whether SHT exposure depended on household tobacco use status.

Aims and methods: This repeated cross-sectional study from 2011 to 2021 (15 927 participants) was based on data from an annual survey of fourth-grade students (aged 10 years) in Kumagaya City, Japan. In addition to a questionnaire which includes questions about household tobacco use status, we measured the urinary cotinine levels of each participant by their first-morning urine sample to objectively assess SHT exposure. We defined the participants with urinary cotinine levels ≥5.0 ng/mL as being exposed to SHT.

Results: The prevalence of SHT exposure decreased over the 11-year period from 18.6% in 2011 to 5.3% in 2021. It was significantly higher in households with tobacco users than without tobacco users (t-test p< .001). Prevalence of SHT exposure was 1.4% among the 68.1% of households not using tobacco, 22.9% among the 16.5% using only CC, 3.1% among the 12.3% using only HTP, and 27.6% among the 3.9% of households using CC and HTP.

Conclusions: While the prevalence of SHT exposure showed a decreasing trend from 2011 to 2021, the prevalence of SHT exposure was higher in children with household members using tobacco products, regardless of the type of tobacco product, than in those without tobacco users.

Implications: This study observed that the prevalence of SHT exposure was higher among children in households with tobacco users than among those without tobacco users, regardless of the type of tobacco product. Our findings highlight the importance of advocating that HTPs do not reduce the likelihood of SHT exposure to bystanders.

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利用尿液中的可替宁评估日本 10 岁儿童的二手烟暴露情况：一项为期 11 年的重复横断面研究。

简介：由于加热烟草制品（HTP）的出现，除了将可燃卷烟（CC）烟雾作为二手烟（SHT）暴露源外，监测加热烟草制品产生的气溶胶也变得非常重要。我们调查了学龄儿童的二手烟暴露趋势，并评估了二手烟暴露是否与家庭烟草使用状况有关：这项2011年至2021年的重复横断面研究（15927名参与者）基于日本熊谷市四年级学生（10岁）的年度调查数据。除了包括家庭烟草使用状况在内的调查问卷外，我们还测量了每位参与者清晨第一次尿液样本中的尿可替宁水平，以客观评估SHT暴露情况。我们将尿中可替宁水平≥5.0纳克/毫升的参与者定义为暴露于SHT：结果：11年间，SHT暴露率从2011年的18.6%降至2021年的5.3%。有烟草使用者的家庭明显高于无烟草使用者的家庭（t 检验）：虽然从2011年到2021年，SHT暴露的流行率呈下降趋势，但有家庭成员使用烟草制品（无论烟草制品的类型）的儿童的SHT暴露流行率高于无烟草使用者的儿童：本研究发现，无论烟草制品的类型如何，有烟草使用者的家庭中儿童的SHT暴露流行率高于无烟草使用者的家庭。我们的研究结果凸显了倡导烟草烟雾剂不会降低旁观者接触SHT的可能性的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nicotine & Tobacco Research 医学-公共卫生、环境卫生与职业卫生

CiteScore

8.10

自引率

10.60%

发文量

268

审稿时长

3-8 weeks

期刊介绍： Nicotine & Tobacco Research is one of the world''s few peer-reviewed journals devoted exclusively to the study of nicotine and tobacco. It aims to provide a forum for empirical findings, critical reviews, and conceptual papers on the many aspects of nicotine and tobacco, including research from the biobehavioral, neurobiological, molecular biologic, epidemiological, prevention, and treatment arenas. Along with manuscripts from each of the areas mentioned above, the editors encourage submissions that are integrative in nature and that cross traditional disciplinary boundaries. The journal is sponsored by the Society for Research on Nicotine and Tobacco (SRNT). It publishes twelve times a year.