OCCUPATION AND HEALTH ›› 2026, Vol. 42 ›› Issue (3): 368-373.

• Treatise • Previous Articles     Next Articles

Analysis of the current status and influencing factors of household thirdhand smoke exposure among preschool children in Beijing

LI Zihui1, CAO Yuan2, HE Langzhi1, SHI Fan3, KONG Haonan4, WANG Yun1()   

  1. 1. Department of Occupational and Environmental HealthSchool of Public Health,Peking UniversityBeijing 100191,China
    2. Beijing Center for Disease Control and PreventionBeijing 100013,China
    3. Beijing Mentougou District Center for Diseases Control and PreventionBeijing 102300,China
    4. Beijing Chaoyang District Center for Diseases Control and PreventionBeijing 100021,China
  • Received:2025-04-30 Revised:2025-05-09 Online:2026-02-01 Published:2026-03-06
  • Contact: WANG Yun,E-mail:wangyun@bjmu.edu.cn

Abstract:

Objective To analyze the current status and influencing factors of thirdhand smoke(THS) exposure among preschool children in household environments in Beijing,so as to provide a scientific basis for developing regional THS prevention and control measures and promoting child health. Methods A stratified cluster sampling method was used to select 1 748 children aged 4-6 years from kindergartens in Beijing from February to April 2023. A questionnaire survey was conducted to collect data on household THS exposure characteristics,followed by statistical analysis. Results The household THS exposure rate among preschool children in Beijing was 58.12%. The exposure rate in suburban areas(70.97%) was significantly higher than that in urban areas(47.13%)(χ2=101.371,P<0.05). Younger parental age and lower parental education level were associated with higher THS exposure rates(all P<0.05). Among the types of THS exposure,mixed exposure was the most prevalent(33.47%),followed by single exposure(13.62%),and occasional exposure was the least common(11.04%). Suburban households had higher rates of indoor smoking permission,higher proportions of multi-smoker households(where both parents and grandparents smoke),greater prevalence of cigarette smoking,greater daily cigarette consumption,and lower frequencies of indoor surface cleaning compared to urban households(all P<0.05). Conclusion The household THS exposure rate among preschool children in Beijing remains high and is influenced by factors such as residential area,parental age,and education level. Suburban children face more severe THS exposure,necessitating targeted regional prevention and control and health intervention measures to effectively reduce THS exposure risks.

Key words: Thirdhand smoke, Preschool children, Exposure characteristics, Influencing factors

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