The purpose of this study is to realize the first evaluation of the psychometric characteristics of the Chinese version of the the Penn State University Electronic Cigarette Dependence Index Scale.

This study will use forward translation, reverse translation, and comprehensive methods to Chinese-translate the Penn State University Electronic Cigarette Dependence Index Scale to form a Chinese version of the Penn State University Electronic Cigarette Dependence Index Scale that is more in line with the Chinese language and cultural environment. This study will also verify its reliability and validity in a large sample population to form a formal version of the scale. The scale will provide an effective tool for evaluating the degree of e-cigarette dependence among young people and adolescents in my country.

Inclusion Criteria:

• (1)≥18 years old;
• (2)Those who used e-cigarettes at least once a week for the past month;
• (3)Be able to read and communicate in Chinese.

Exclusion Criteria:

• Those who are unable to communicate due to serious mental or physical illnesses such as deafness, confusion caused by mental illness, etc.

A total number of 275 adults who used nicotine-containing e-cigarettes at least once a week for the past month and have smoked daily for the last 3 months

The non-identified individual participant data will be shared after the outcomes have been published.

After the publication of the study.

Researchers should contact the PI for approval of the study protocol.