Kramer 2009.

Trial name or title	Effectiveness of a web‐based self‐help smoking cessation intervention: protocol of a randomised controlled trial
Methods	Study design: randomised controlled trial Recruitment: Participants were recruited over a 1‐year period using advertisements in daily and weekly national or regional newspapers or on the Internet. Enrolment took place by a website
Participants	Inclusion criteria: Adults aged18 and older who were currently smoking cigarettes or rolling tobacco, were willing to quit smoking within 3 months and have Internet access Exclusion criteria: smokers who were already preparing to stop smoking with the support of a coach, a course of pharmacotherapy, or if they were already enrolled in another smoking cessation study
Interventions	Intervention: web‐based interactive self‐help intervention (Stop SIte) Control: access to the Dutch online self‐help guide developed by STIVORO
Outcomes	Primary outcome measure: prolonged abstinence in the past 3 months Secondary outcomes: PPA, number of cigarettes smoked, and incidence of quit attempts at follow‐up assessments Methods of assessing outcome:  self‐reported smoking abstinence Methods of follow‐up for non‐respondents: ITT analysis Timing of outcome assessment: 3 and 12 months after 1‐month grace period from starting the intervention after baseline
Starting date	Trial status completed, only linked publication is published protocol noted in references
Contact information	jkramer@trimbos.nl
Notes