Overview
The data used in this study are from follow-up participants in wave 4 of the Vaping and Patterns of e-Cigarette Use Research (VAPER) Study, a web-based longitudinal cohort study (July to September 2022) of US adults (aged 21 years or older) who use e-cigarettes ≥5 days per week. Participants were rescreened in each wave to ensure ≥5 days per week of e-cigarette use. More information about the study is available elsewhere [Participants’ progress was tracked to assess differences in participants passing through 5 distinct stages of the survey: starting the survey, completing a screener, being deemed eligible upon screener completion (e-cigarettes use ≥5 days per week), completing the full survey, and being deemed valid after a data quality review. Chi-square tests were used to assess differences between the two incentive groups in (1) participant completion of each survey stage and (2) participant demographics in the final sample (Stata 16.1; StataCorp LLC).