Behavioral Interventions for Tobacco Cessation in Low and Middle-Income Countries: A Systematic Review and Meta-analysis.

Introduction: An estimated 78% of the total deaths attributable to smoking tobacco use occurred in low- and middle-income countries (LMICs) in 2019. In addition, smokeless tobacco increases the risk of all-cause mortality, all cancers including upper aero-digestive tract cancer, stomach cancer, ischaemic heart disease (IHD) and stroke; with 88% of the mortality burden being borne by the South-East Asian region. Evidence-based interventions from high income countries (HICs) are not easily transferable to LMICs, as patterns of tobacco use, health beliefs associated with tobacco use, and awareness of specific health risks vary substantially.

Methods: We synthesised the effectiveness of behavioural interventions for tobacco cessation in LMICs through a systematic review and meta-analysis. Interventional studies which delivered individual behavioural intervention and assessed abstinence from tobacco use were included. We examined the pooled intervention effect at six months post-intervention follow up.

Results: For continuous abstinence at six months, the intervention was superior to active comparator (RR 2.32; 95% CI 1.78-3.02), and usual care (RR 4.39; 95% CI 2.38-8.11). For point prevalence abstinence at six months, the intervention was superior to active comparator (RR 1.76; 95% CI 1.28-2.44), and usual care (RR 2.37; 95% CI 1.47-3.81). The statistical heterogeneity was substantial to considerable for all comparisons. Only six studies had an overall low risk of bias. Publication bias was observed for all comparisons, except for 6-month continuous outcomes.

Conclusion: Implementation research is needed to understand factors for programme sustainability and equity of impact of behavioural interventions in reducing tobacco use in LMICs.

Implications: Our review is an important step towards the understanding of effectiveness of behaviour interventions for tobacco cessation suited for low- and middle-income countries and which are responsive to the contextual needs of such countries.