Secondhand smoke exposure at home and public places among smokers and non-smokers in India: findings from the Global Adult Tobacco Survey 2016-17.

Secondhand smoke (SHS) accounts for 0.9 million deaths and 24 million disability adjusted life years (DALYs) annually. Nearly 30% of adults in India are exposed to SHS in India. To reduce SHS exposure, India enacted a smoke-free law in 2003 under which smoking in public places is banned. However, the compliance to this law has been variable in several assessments in the country. A better understanding of the nature and extent of SHS exposure can help inform better implementation of national smoke-free policies. The Global Adult Tobacco Survey (GATS) India 2016-17 collects information on the self-reported prevalence of SHS exposure in homes, workplaces, government buildings, restaurants, public transportation and health care facilities among adults (> 15 years of age).The present study utilized the GATS India 2016-17 dataset to provide estimates of SHS exposure among adults in India in homes, workplace and other public places, across gender and age groups and among the overall population and non-smokers. Weighted analysis was carried out. In the overall population, exposure to SHS in the home was 29.2%, more among young females. In workplaces, exposure to SHS was 29.2% overall, significantly higher among males (32.5%) compared to females (17.8%). In public buildings such as health care facilities and government offices, SHS exposure was less with 15.6% and 21.2% respectively. SHS exposure was high in restaurants with 39.3% overall, significantly higher among males (43.2%) compared to females (22.2%). Similar results were also seen among non-smokers. A large proportion of adults in India, both smokers and non-smokers are exposed to SHS in their homes, workplaces and other public places, especially restaurants, workplaces and public transportation. Females are more exposed to SHS at home, whereas males are more exposed in public places including workplaces. High SHS exposure among youths is also a concern. Stricter enforcement of legislation is required to ensure 100% smoke-free homes, public places and workplaces and reduce SHS exposure.