Exclusive e-cigarette use predicts cigarette initiation among college students.

Area of Science:

• Public Health
• Tobacco Control
• Adolescent Health

Background:

• Existing research links electronic nicotine delivery systems (ENDS) use to subsequent cigarette initiation.
• Gaps remain in understanding if this risk differs between exclusive ENDS users and those using ENDS alongside other tobacco products.

Purpose of the Study:

• To investigate if young adults who have never used cigarettes but have used ENDS have a higher likelihood of initiating cigarette use compared to non-ENDS users.
• To determine if the risk of cigarette initiation is consistent among exclusive ENDS users and those using ENDS with other tobacco products.

Main Methods:

• A longitudinal study followed 2558 cigarette-naïve college students aged 18-25 over four waves, with six-month intervals.
• Multivariable, multilevel discrete-time hazard models were employed to analyze the data.

Main Results:

• 11% of participants initiated cigarette use by wave 4.
• Wave 1 ENDS use significantly predicted subsequent cigarette initiation, independent of other risk factors like susceptibility and peer/family tobacco use.
• Exclusive ENDS users showed a greater odds of initiating cigarettes compared to non-users.

Conclusions:

• Electronic nicotine delivery systems (ENDS) use is a specific risk factor for future cigarette smoking among young adults.
• This finding suggests ENDS initiation is not merely part of a broader pattern of existing tobacco use behaviors.