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Completed

NCT Number: NCT02949648

Electronic Cigarette Use and Quitting in Youth

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.

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Key information

Conditions

Smoking Behavior Vaping

Age range

Up to 25 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Youth Quitline, School of Nursing, The University of Hong Kong

Hong Kong

About this study

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.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Electronic cigarette

Device

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.

Other names: Electronic nicotine delivery system

Primary outcomes

  1. 7-day point prevalence abstinence assessed in the telephone follow-up survey

    Time frame: 12 months after baseline 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.

Secondary outcomes

  1. Quit attempts assessed in the telephone follow-up survey

    Time frame: 12 months after baseline survey

    Smokers report how many times they try to abstain from cigarette for more than 24 hours in the whole follow-up period

  2. Intention to quit assessed in the telephone follow-up survey

    Time frame: 12 months after baseline survey

    Smokers report whether they intend to quit smoking at the time of 12-month survey in the follow-up

Sponsors and collaborators

Lead sponsor

The University of Hong Kong

Other

Registry information

Official study title

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

Important dates

Study start
2015
Primary completion
2016
Study completion
2016
First posted
Oct 31, 2016
Registry last updated
Oct 31, 2016

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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