Assessing exposure to secondhand smoke among Iranian patients with cardiac diseases; a cross-sectional study.

Introduction: Studies have linked secondhand smoke (SHS) exposure to adverse health effects. The high prevalence of heart disease necessitates the need for studies in this field. Therefore, the aim of the present study was to assess the exposure to SHS in cardiac patients. Method: This study is a cross-sectional descriptive study. A total of 430 patients who were referred to Imam Ali Hospital in Kermanshah, Iran, in 2020 were included in the study based on predetermined inclusion and exclusion criteria. The researchers collected and recorded demographic information, disease history, and exposure to secondhand smoke (SHS) through a digital questionnaire. Bivariate analysis was conducted using a chi-square test and an independent T-test, depending on the variable scale. Results: The results of the study showed that 237 patients were male (55.12 %) and 193 were female (44.8 %). The prevalence of exposure to secondhand smoke was 72.09 %. Notably, the highest rate of exposure to secondhand smoke was associated with 'exposure to tobacco smoke in public places' with a rate of 69.30 %. Additionally, it was observed that approximately 39.07 % of patients reported exposure to secondhand smoke in public places at least once a week. Conclusion: The present study has found that cardiac patients frequently experience secondhand smoking exposure, with public settings being the primary location of exposure. Implementing intervention strategies and enacting laws that prohibit smoking can effectively mitigate the negative impact of SHS exposure.