A smoke-free workplace is important to reduce secondhand smoke exposure, raise awareness, encourage smoking cessation, and increase productivity. This study aimed to assess indoor smoking in the workplace as part of a smoke-free policy implementation and the factors associated. This was a cross-sectional study at workplaces in Indonesia from October 2019 to January 2020. The workplaces were divided into private workplaces owned by a company for business and government workplaces that run for public services. Samples were selected using stratified random sampling. Data collection follows time and area observation guidelines, starting in the indoor area and then outdoor. The observation was conducted for at least 20 min for each workplace in 41 districts/cities. Of the 2900 observed workplaces, 1097 (37.8%) were private and 1803 (62.92%) were government workplaces. The proportion of indoor smoking at government workplaces was 34.7%, higher compared to private (14.4%). The results were consistent for each indicator such as people smoking (14.7% vs. 4.5%), electronic cigarette use (0.7% vs. 0.4%), cigarette butts presence (25.8% vs. 9.5%), and smell of cigarette smoke (23.0% vs. 8.6%). The factors associated with indoor smoking were indoor ashtray availability (adjusted odds ratio [AOR] =13.7; 95% confidence interval [CI]: 10.6-17.5), indoor designated smoking area (AOR = 2.4; 95% CI: 1.4-4.0), presence of indoor tobacco advertising, promotion and sponsorships (AOR: 3.3; 95% CI: 1.3-8.89), whereas the presence of no smoking sign was a preventive factor (AOR = 0.6; 95% CI: 0.5-0.8). Indoor smoking remains high, particularly in government workplaces in Indonesia.
Keywords: Indonesia; smoke-free policy; smoking; tobacco control; workplace.