Relapse prevention in UK Stop Smoking Services: current practice, systematic reviews of effectiveness and cost-effectiveness analysis.

摘要

BACKGROUND: Reducing smoking is a chief priority for governments and health systems like the UK National Health Service (NHS). The UK has implemented a comprehensive tobacco control strategy involving a combination of population tobacco control interventions combined with treatment for dependent smokers through a national network of NHS Stop Smoking Services (NHS SSS). OBJECTIVES: To assess the effectiveness and cost-effectiveness of relapse prevention in NHS SSS. To (1) update current estimates of effectiveness on interventions for preventing relapse to smoking; (2) examine studies that provide findings that are generalisable to NHS SSS, and which test interventions that might be acceptable to introduce within the NHS; and (3) determine the cost-effectiveness of those relapse preventions interventions (RPIs) that could potentially be delivered by the NHS SSS. DATA SOURCES: A systematic review of the literature and economic evaluation were carried out. In addition to searching the Cochrane Tobacco Addiction Group register of trials (2004 to July 2008), MEDLINE, the Cochrane Central Register of Controlled Trials, EMBASE, PsycINFO, the Science Citation Index and Social Science Citation Index were also searched. REVIEW METHODS: The project was divided into four distinct phases with different methodologies: qualitative research with a convenience sample of NHS SSS managers; a systematic review investigation the efficacy of RPIs; a cost-effectiveness analysis; and a further systematic review to derive the relapse curves for smokers receiving evidence-based treatment of the type delivered by the NHS SSS. RESULTS: Qualitative research with 16 NHS SSS managers indicated that there was no shared understanding of what relapse prevention meant or of the kinds of interventions that should be used for this. The systematic review included 36 studies that randomised and delivered interventions to abstainers. 'Self-help' behavioural interventions delivered to abstainers who had achieved abstinence unaided were effective for preventing relapse to smoking at long-term follow-up [odds ratio (OR) 1.52, 95% confidence interval (CI) 1.15 to 2.01]. The following pharmacotherapies were also effective as RPIs after their successful use as cessation treatments: bupropion at long-term follow-up (pooled OR 1.49, 95% CI 1.10 to 2.01); nicotine replacement therapy (NRT) at medium- (pooled OR 1.56, 95% CI 1.16 to 2.11) and long-term follow-ups (pooled OR 1.33, 95% CI 1.08 to 1.63) and one trial of varenicline also indicated effectiveness.