AI Article Synopsis
- - The study investigates the health impact of secondhand smoke (SHS) in households in Dhaka, Bangladesh, highlighting that indoor particulate matter (PM) levels can differ significantly between homes that allow smoking and those that don't.
- - A total of 1,746 households were surveyed, revealing that homes permitting smoking had an average of 5 µg/m³ higher PM levels compared to smoke-free homes, with various factors like education level and outdoor space linked to lower PM levels.
- - The results indicate that PM levels in Dhaka are significantly lower than those found in high-income countries, suggesting that the implications of SHS exposure may vary across different economic contexts.
Article Abstract
Introduction: Exposure to secondhand smoke (SHS) is a health risk to non-smokers. Indoor particulate matter (PM) is associated with SHS exposure and is used as a proxy measure. However, PM is non-specific and influenced by a number of environmental factors, which are subject to geographical variation. The nature of association between SHS exposure and indoor PM-studied primarily in high-income countries (HICs) context-may not be globally applicable. We set out to explore this association in a low/middle-income country setting, Dhaka, Bangladesh.
Methods: A cross-sectional study was conducted among households with at least one resident smoker. We inquired whether smoking was permitted inside the home (smoking-permitted homes, SPH) or not (smoke-free homes, SFH), and measured indoor PM concentrations using a low-cost instrument (Dylos DC1700) for at least 22 hours. We describe and compare SPH and SFH and use multiple linear regression to evaluate which variables are associated with PM level among all households.
Results: We surveyed 1746 households between April and August 2018; 967 (55%) were SPH and 779 (45%) were SFH. The difference between PM values for SFH (median 27 µg/m, IQR 25) and SPH (median 32 µg/m, IQR 31) was 5 µg/m (p<0.001). Lead participant's education level, being a non-smoker, having outdoor space and smoke-free rule at home and not using kerosene oil for cooking were significantly associated with lower PM.
Conclusions: We found a small but significant difference between PM concentrations in SPH compared with SFH in Dhaka, Bangladesh-a value much lower than observed in HICs.
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| http://dx.doi.org/10.1136/tobaccocontrol-2020-055969 | DOI Listing |
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