The Cessation of Smoking Trial in The Emergency Department (COSTED)

COSTED is an NIHR funded multi-centre randomised, controlled trial (ClinicalTrial.gov: NCT04854616) which has recruited 972 participants from six Emergency Departments across the UK. Participants were randomised to control (written information about local stop smoking services) or intervention (brief smoking cessation intervention from a trained advisor, provision of an e-cigarette starter kit, training on its use and referral to local stop smoking services). Both groups were followed up 1, 3 and 6 months after randomisation. Smoking abstinence was biochemically verified at 6 months. we will report biochemically verified quit rates between groups (primary outcome), self-reported point prevalence by group and changes to number of cigarettes per day between the groups. We will also present the results of the economic evaluation and a synopsis of the results of the process evaluation.