Quasi-experimental study on the impact of local smoke-free policies on smoking among Indonesian adults: Evidence from repeated national health surveys.

BACKGROUND

Smoke-free policies (SFPs) have been effective in reducing smoking prevalence, but evidence remains limited for low- and middle-income countries. Due to decentralized governance in Indonesia, SFPs are adopted in different ways in different locations. This study aims to assess the impact of local smoke-free policies (SFPs) on current smoking among Indonesian adults.

METHODS

Data from national health surveys conducted in 515 districts and 34 provinces in 2007, 2013, and 2018, involving 1,599,517 adults, were analyzed. A multilevel logistic regression analysis was performed, considering variables such as survey year, SFP adoption in 2007, SFP between 2007 and 2013, SFP between 2013 and 2018, socio-demographic factors, and district characteristics.

RESULTS

Moderate (OR:0.94, 95%CI:0.91-0.97) and strong (OR:0.95, 95%CI:0.0.92-0.98) district-level SFPs between 2013 and 2018 were associated with decreased odds of current smoking, compared to no district-level SFP adoption. Similar results were observed for moderate (OR:0.91, 95%CI:0.86-0.96) and strong (OR:0.89, 95%CI:0.85-0.94) district-level SFPs between 2007 and 2013, compared to no district-level SFP. Compared to provinces without SFPs, individuals living in provinces with moderate SFPs between 2007 and 2013 had lower odds of current smoking (OR:0.67; 95% CI:0.63-0.71), while those in districts with moderate SFPs between 2013 and 2018 had higher odds (OR: 1.08, 95% CI: 1.05-1.11).

CONCLUSIONS

Local SFPs demonstrated a potential in reducing smoking persistence in Indonesia, particularly at the district level. However, the impact of province-level SFPs differed. Tailored SFPs and district-province strategies, focusing on synchronizing the top-down SFP implementation in the Indonesia's decentralized systems, are critical for lowering smoking rates.