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Skip search results from other journals and go to results- 825 Journal of Medical Internet Research
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While rates of e-cigarette use declined from the previous year, demonstrating the success of public health efforts and policy regulations to prevent or reduce use among youth (eg, warning labels, and drug and tobacco policies to regulate sales and access) [2,3], 38.4% of the students using e-cigarettes reported frequent use (at least 20 out of 30 days) and 26.3% reported daily use [4].
JMIR Res Protoc 2025;14:e71927
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For compensation, participants were either entered into a draw for 10 Aus $100 (US $65) e-gift cards (cohort 1) or received an Aus $50 (US $33) e-gift card (cohort 2).
Three unique identifiers were randomly assigned to each participant: one upon receipt of the study invitation; one during screening; and one upon confirmation of eligibility. These identifiers enabled linkage between baseline and digital phenotyping data for participants from AGDS.
JMIR Form Res 2025;9:e71377
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