Mobile Chat Messaging for Smoking Relapse Prevention

Standard smoking cessation treatment (behavioural and pharmacotherapy) provided by Tung Wah Group of Hospitals Integrated Centre on Smoking Cessation

Personalised chat messaging focusing on smoking relapse prevention for 3 months from randomisation. A trained counsellor will interact with a participant individually and provide relapse prevention advice via WhatsApp. The participant can also access a supportive chatbot in WhatsApp, which will provide on-demand smoking relapse prevention support when the counsellor is not available (e.g., during nighttime).

SMS text messaging on generic information about the harms of smoking and the benefits of quitting for 3 months from randomisation.