Supporting drug and alcohol service users to cut down or stop smoking: review and evidence.gaps

BACKGROUND: Globally, drug and alcohol service users are underserved by smoking cessation and tobacco control services despite their high rates of smoking, smoking-related disease and interest in quitting or cutting down. DASHES (drug and alcohol users help to exit smoking) is developing and evaluating a tobacco harm reduction intervention with service users and staff of specialist third sector and NHS services, public health, and policymakers. It combines NHS Scotland behavioural change, pharmacotherapy, NRT delivered as vapes and tailored support. We sought evidence of approaches on which to build and assess our model. METHODS: Rapid review of smoking cessation interventions for drugs and/or alcohol service users. Papers screened by title and abstract, extracted using Covidence and appraised by 4 researchers using CASP guidance. Included papers were quality reviewed. We used PROGRESS-PLUS to assess consideration of equity. Narrative synthesis explored components of smoking cessation/reduction interventions. RESULTS: We quality reviewed 29 eligible studies. Heterogeneity and lack of power precluded meta-analysis and limited estimation of effect sizes. Some interventions fell short of existing, evidence-based practice. Despite funders and authorities requiring commitment to increasing equity and diversity of research participation, few studies monitored or addressed equity of participation, barriers to smoking cessation or provision of trauma-informed care explicitly. Promising interventions included designs and supportive features that mitigate healthcare inequities for other conditions. CONCLUSIONS: Our review identified promising components for inclusion in DASHES but effective and equitable delivery of smoking cessation/reduction services for people using drug and alcohol services remains understudied. Lack of attention contributes to the ongoing burden of avoidable disease and death associated with tobacco-related harm in this population. KEY MESSAGES: • Smoking-related inequities will continue and drug and alcohol service users remain underserved by smoking cessation/tobacco control services until gaps in the evidence base are addressed. • Action to assure equity in research participation, quality and design of interventions remains limited and must be addressed by policymakers funders, researchers and services.