Effect of exposure to secondhand tobacco smoke on respiratory health: a secondary analysis of the ASHES study
1
Preventive Medicine and Public Health, University of Santiago de Compostela, Santiago de Compostela, Spain
2
Department of Pulmonology and Thoracic Surgery/Research Unit, Nuestra Señora de Candelaria University Teaching Hospital, Santa Cruz de Tenerife, Spain
3
Paediatric Pulmonology, Canary Islands University Teaching Hospital, Tenerife, Spain
Popul. Med. 2026;8(Supplement Supplement 1):A2978
ABSTRACT
INTRODUCTION:
Exposure to secondhand tobacco smoke (SHS) is a notable risk factor. We analyzed the prevalence and distribution of SHS exposure in a cohort of healthy adults, as well as its impact on lung function and respiratory symptoms.
METHODS:
Secondary analysis of the ASHES study, which aims to analyze the impact of the volcanic eruption on La Palma (Spain). Adult subjects participating in the ASHES study were analyzed, and sociodemographic information, tobacco use, and exposure to SHS (home and private transportation, as well as intensity of exposure in hours per week) were collected. In addition, pre-bronchodilator spirometry was performed and information on symptoms in the last month was collected between 1 and 3 years after the volcanic eruption. The analysis was stratified by tobacco use. SHS exposure was categorized into 0, 1, or 2 settings (home and/or private transportation). Lung function was assessed using FVC, FEV1, and FEV1/FVC ratio. Linear regressions were adjusted for lung function parameters and logistic regressions for the respiratory symptoms, adjusting for age, sex, body mass index, and volcano exposure (high, moderate and not exposed).
RESULTS:
435 participants were analyzed. The prevalence of SHS exposure was 26.4% (18.4% one setting; 8.0% two settings). Smokers showed the highest SHS exposure (51.9%), ex-smokers had the lowest (15.6%). In never-smokers, exposure in two SHS settings was associated with a significant reduction in FVC (-8.29 % points; 95%CI: -13.99 to -2.58; p=0.005) and a non-significant decrease in FEV1 (-9.16%;p=0.136), compared to not exposed. No significant effects were observed in ex-smokers or smokers. No significant associations were found between SHS exposure and respiratory symptoms in any group.
CONCLUSIONS:
SHS exposure may be associated with the worsening of lung function in never-smokers, especially when it occurred in more than one setting. No significant effects on the presence of respiratory symptoms were observed.
Exposure to secondhand tobacco smoke (SHS) is a notable risk factor. We analyzed the prevalence and distribution of SHS exposure in a cohort of healthy adults, as well as its impact on lung function and respiratory symptoms.
METHODS:
Secondary analysis of the ASHES study, which aims to analyze the impact of the volcanic eruption on La Palma (Spain). Adult subjects participating in the ASHES study were analyzed, and sociodemographic information, tobacco use, and exposure to SHS (home and private transportation, as well as intensity of exposure in hours per week) were collected. In addition, pre-bronchodilator spirometry was performed and information on symptoms in the last month was collected between 1 and 3 years after the volcanic eruption. The analysis was stratified by tobacco use. SHS exposure was categorized into 0, 1, or 2 settings (home and/or private transportation). Lung function was assessed using FVC, FEV1, and FEV1/FVC ratio. Linear regressions were adjusted for lung function parameters and logistic regressions for the respiratory symptoms, adjusting for age, sex, body mass index, and volcano exposure (high, moderate and not exposed).
RESULTS:
435 participants were analyzed. The prevalence of SHS exposure was 26.4% (18.4% one setting; 8.0% two settings). Smokers showed the highest SHS exposure (51.9%), ex-smokers had the lowest (15.6%). In never-smokers, exposure in two SHS settings was associated with a significant reduction in FVC (-8.29 % points; 95%CI: -13.99 to -2.58; p=0.005) and a non-significant decrease in FEV1 (-9.16%;p=0.136), compared to not exposed. No significant effects were observed in ex-smokers or smokers. No significant associations were found between SHS exposure and respiratory symptoms in any group.
CONCLUSIONS:
SHS exposure may be associated with the worsening of lung function in never-smokers, especially when it occurred in more than one setting. No significant effects on the presence of respiratory symptoms were observed.
| eISSN: | 2654-1459 |
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