To understand the risk perception, behaviour, and attitudes related to electronic cigarettes and other tobacco products among youth.

Phase I Individual qualitative interviews will be conducted to understanding the needs and concerns of youth smokers of e-cigarette or other new tobacco products, including their risk perceptions, and the behaviour, attitudes, and experiences related to these products.

Phase II The findings from the interview in phase I will guide the development of a structure questionnaire for a cross-sectional survey to further explore the behaviour, attitudes, and experiences related to e-cigarette or other new tobacco products among youth.

The findings of this study have important implications for research and clinical practice. Understanding how youth smokers perceive the risks of using e-cigarette and other new tobacco products, and their behaviour, attitudes, experiences related to smoking to help them achieve smoking abstinence. Moreover, the results of this study can understand the misconceptions about e-cigarette and other new tobacco product among youth, increase their perception of the risks of continued smoking and benefits of quitting.

Inclusion Criteria:

• Youth smokers who contacted the Youth Quitline will be eligible to be included in this study if they (1) are ethnic Chinese; (2) are aged ≤ 25 years; (3) are ever user of e-cigarette or any new tobacco products; and (4) spoke Cantonese.

Exclusion Criteria:

• psychologically or physically unable to communicate

Youth smokers

The relevant anonymized patient level data, full dataset, technical appendix, and statistical code are available on reasonable request. The approval from the Principal Investigator for the purpose of data use is required.

After the project is completed and the results of the project has been published.

Request could be sent to Principal Investigator (william3@hku.hk)