ACTRN12618000291280.

Trial name or title	Effectiveness of quit smoking motivation with carbon monoxide feedback module (COQUIT) among college smoker in Selangor
Methods	Single‐blinded cluster‐randomised controlled trial at 10 tertiary colleges
Participants	160 students at Community College in Selangor, Malaysia
Interventions	Standard brief 5R motivational strategy and an additional CO motivational feedback module. Expired carbon monoxide is measured by the principal investigator on a 1‐to‐1 basis. The CO reading is recorded directly into the iPad (using a mobile phone application) together with explained feedback about the result and interpretation. The result of the CO is then e‐mailed to the participants. Participants in the control group only receive the standard brief 5R motivational strategy.
Outcomes	Primary: stage of changes based on the Transtheoretical Model that will be measured using validated questionnaire at 1, 3, and 6 months postintervention Secondary: any quit attempt defined as 24 hours of not smoking, number of cigarettes smoked per day, and smoking habit at 1, 3, and 6 months
Starting date	Anticipated 16 April 2018
Contact information	Dr Muhammad Adil Zainal Abidin adilzainal@gmail.com
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