Mortality Attributable to Environmental Tobacco Smoke Exposure in Spain in 2020

Abstract

Introduction and objectives: Exposure to environmental tobacco smoke (ETS) is associated with increased mortality and morbidity. The objective of this study was to estimate the impact of ETS exposure in Spain on mortality in 2020 in the population aged 35 years and over.

Methods: A method of estimating attributable mortality (AM) based on the prevalence of ETS exposure was applied. Prevalence data were obtained from a representative study conducted in Spain and the relative risks were derived from a meta-analysis. AM point estimates are presented along with 95% confidence intervals (95% CI), calculated using a bootstrap naive procedure. AM, both overall and by smoking habit, was estimated for each combination of sex, age group, and cause of death (lung cancer and ischemic heart disease). A sensitivity analysis was performed.

Results: A total of 747 (95% CI 676-825) deaths were attributable to ETS exposure, of which 279 (95% CI 256-306) were caused by lung cancer, and 468 (95% CI 417-523) by ischemic heart disease. Three-quarters (75.1%) of AM occurred in men and 60.9% in non-smokers. When chronic obstructive pulmonary disease and cerebrovascular disease are included, the burden of AM is estimated at 2242 deaths.

Conclusions: ETS exposure is associated with 1.5% of all deaths from lung cancer and ischemic heart disease in the population aged 35 and over. These data underline the need for health authorities to focus on reducing exposure to ETS in all settings and environments.

Keywords: Cerebrovascular disease; Chronic obstructive pulmonary disease; Ischemic heart disease; Lung cancer; Mortality; Second-hand tobacco smoke.