Electronic Cigarette Use and Quitting in Youth

Study Overview
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Brief Summary
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A mixed method (longitudinal, trajectory and qualitative studies) to provide comprehensive evidence on the impact of e-cigarette use on smoking and quitting among smoking youth in Hong Kong.

Detailed Description
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Subjects are from a cohort of Youth Quitline callers and smoking youth (N=200) in Hong Kong. The longitudinal study will investigate the effects of baseline e-cigarette use on quitting (including relapse), nicotine addiction and intention to smoke at 12-month telephone follow-up. A qualitative study will be conducted on 10 ex- and 10 current smokers to supplement and facilitate interpretation of the quantitative findings.

Official Title
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A Pilot Study on Electronic Cigarette Use and Their Impact on Smoking and Quitting in Youth

Conditions
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Smoking

Intervention / Treatment
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* Device: Electronic cigarette


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Ethnic Chinese Cantonese speakers Smoke at least 1 cigarette in the past 30 days Exclusion Criteria: Psychologically or physically unable to communicate Undergoing other smoking cessation programme

Ages Eligible for Study
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Maximum Age: 25 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Electronic cigarette ever user<br>Youth Quitline callers who reported ever use of e-cigarette at baseline. | Device: Electronic cigarette<br>* Electronic cigarettes are devices that do not burn or use tobacco leaves but instead vaporize a solution the user then inhales. The device contains an electronic vaporization system, rechargeable batteries, electronic controls and cartridges of the liquid is vaporized.<br>* Other names: Electronic nicotine delivery system;|
| Electronic cigarette never user<br>Youth Quitline callers who reported never use of e-cigarette at baseline. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 7-day point prevalence abstinence assessed in the telephone follow-up survey | Self-reported 7-day point prevalence abstinence (PPA) is a validated, commonly used measure of smoking cessation. Subjects who reports no smoking in the preceding 7 days at the time of 12-month survey in the follow-up are regarded as quitters. This measure has serval advantages compared to continuous abstinence. First, it can include smokers who take delayed action and quit. It also allows relapses to occur in the follow up period, without classifying smokers as permanent failure. Third, it does not rely on recall of past events happened long ago. | 12 months after baseline survey | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Quit attempts assessed in the telephone follow-up survey | Smokers report how many times they try to abstain from cigarette for more than 24 hours in the whole follow-up period | 12 months after baseline survey | 
| Intention to quit assessed in the telephone follow-up survey | Smokers report whether they intend to quit smoking at the time of 12-month survey in the follow-up | 12 months after baseline survey | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Electronic cigarette