An interventional study of Videos featuring influencers promoting e-cigarettes alongside healthy lifestyle activities in Vaping, sponsored by University of Southern California. Completed at 1 site in United States. Open to participants aged 18 Years to 24 Years. Per ClinicalTrials.gov, last updated 2024-05-29.
Sponsored by University of Southern California · Not applicable, Interventional, and Other
Young adults (N = 1,500) will participate in the online survey-based experiment. They will be randomly shown 10 videos, featuring influencers promoting e-cigarettes alongside healthy lifestyle activities (experimental group), or a healthy lifestyle activity alone (control). After watching each video, participants will rate perceptions of influencer credibility (i.e., honesty, trustworthiness, knowledge, attractiveness, intelligence, and popularity) on the scale of 0 (e.g., dishonest) to 100 (honest).
Among all participants, harm perceptions of e-cigarettes will be assessed. Susceptibility to use e-cigarettes will be assessed among never users. These outcomes will then be compared among participants who perceived influencers as credible and those who perceived influencers as non-credible.
Young adults (18-24 years of age) living in California were recruited by YouGov marketing research panel to participate in a survey on tobacco-related attitudes and behaviors. YouGov, a research panel agency, has been used in prior research to survey young adults about their tobacco-related attitudes and behaviors. Respondents (N=1,500) were matched to a sampling frame based on gender, age, race, and education. The sampling frame was a politically representative modeled frame of United States (U.S.) adults based on the American Community Survey. The matched cases were weighted to the sampling frame using a propensity score matching procedure. Participants were provided with a survey URL link. After completing informed consent, participants completed the survey online. The study was approved by the University of Southern California Institutional Review Board (UP-21-00135). Respondents were randomly assigned to watch 10 10-second long TikTok videos in either experimental (influencers promoting e-cigarettes alongside healthy lifestyle activities ) or control group (influencers showing healthy lifestyle activity alone).
University of Southern California is the lead sponsor of 773 studies on the registry; 135 are open to participants now.
Of its 68 completed or terminated interventional studies of FDA-regulated products, 32 (47%) have results posted.
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The survey was sampled to be representative by age group (18 to 24) and gender, and was weighted to be representative by age, gender, race, and educational attainment using propensity score weighting.
Exclusion Criteria:
Not meeting these criteria:
Young adults were randomly shown 10 videos, featuring influencers promoting e-cigarettes alongside healthy lifestyle activities (experimental group).
Other: Videos featuring influencers promoting e-cigarettes alongside healthy lifestyle activities
Young adults were randomly shown 10 videos, featuring influencers promoting healthy lifestyle activity alone (control).
Other: Videos featuring influencers promoting e-cigarettes alongside healthy lifestyle activities
Young adults were randomly shown 10 videos, featuring influencers promoting e-cigarettes alongside healthy lifestyle activities (experimental group), or a healthy lifestyle activity alone (control).
harm perceptions of e-cigarettes
Responses to the question, "Do you think vaping e-cigarettes is harmful to your health?" were measured on a Likert scale, ranging from "definitely yes" (1), "probably yes" (2), to "probably not (3)," "definitely not (4)." The measure represents one validated item from the Population Assessment of Tobacco and Health (PATH).
Time frame: one-time assessment after the experimental exposure (immediately post-treatment)
Susceptibility to use e-cigarettes
Susceptibility to use e-cigarettes was measured (among never-users of e-cigarettes), using the validated three-item scale adapted from PATH, and combined into one variable (α=0.93). Consistent with prior research, the measure was dichotomized with responses "definitely not" to all items being coded as "not susceptible" and responses "probably not," "probably yes", or "definitely yes" being coded as "susceptible."
Time frame: one-time assessment after the experimental exposure (immediately post-treatment)
Perceptions of influencer credibility
Perceptions of influencer credibility (i.e., honesty, trustworthiness, knowledge, intelligence, attractiveness, and popularity) were assessed using a 0 (e.g., dishonest) -100 (e.g., honest) scale that has been validated in prior research.
Time frame: assessed 10 times after each video (during treatment, immediately after each video)
Plan to share: No
No publications or documents are linked to this record.
This study is completed, as verified in May 2024. You cannot join it, but the record below documents what was studied.
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University of Southern California