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. 2025 Jun 5:18:1179173X251338447.
doi: 10.1177/1179173X251338447. eCollection 2025.

Google Trends Analysis of Interest in Smoking Cessation, Treatment Options, and Electronic Nicotine Delivery Systems Following Tax Increase and Introduction of Pictorial Health Warnings in Germany

Tobias Jagomast  1 , Imke Tangemann-Münstedt  1   2 , Mareike Lüthgen  1 , Henrike A Faesser  1 , Thorben Lueg  1 , Daniel Drömann  1   3 , Klaas F Franzen  1   3
Affiliations

Google Trends Analysis of Interest in Smoking Cessation, Treatment Options, and Electronic Nicotine Delivery Systems Following Tax Increase and Introduction of Pictorial Health Warnings in Germany

Tobias Jagomast et al. Tob Use Insights. .

Abstract

Background: Smoking places a significant burden on healthcare systems, necessitating effective tobacco control measures. Pictorial health warnings (PHW) and tax increases have demonstrated great efficacy, yet their impact on cessation treatments and unintended shifts toward electronic nicotine delivery systems (ENDS) remains elusive. This study analyzes changes in public interest following these measures using online search volume for search terms regarding three categories: cessation, treatment, and ENDS.

Methods: An interrupted time series analysis was conducted. First, an online survey in Germany determined relevant tobacco control measures and search terms related to the three categories. Participants (n = 487) were ≥18 years old, with German as their first language. Second, the relative search volume (RSV) of Google for Germany regarding the identified search terms was analyzed around the enactment of the determined measures. This data is an anonymized aggregate of all Google users. Autoregressive integrated moving average models were used to estimate the change in RSV.

Results: The survey identified tax increases and PHW as the most relevant tobacco control measures among selectable options. The tax increase in 2022 elicited a greater shift in RSV than the implementation of PHW in 2016. Substantial peaks in RSV only occurred following the tax increase, with no significant anticipatory effects. After the tax increase, interest in cessation-related terms seemed to rise (week 1: smoke free 6.53% [95% CI -6.78%-19.84%], quit smoking 12.17% [95% CI -0.15%-24.49%]), alongside a significant rise in searches for ENDS (week 2-3: e-cigarette 9.15% [95% CI 1.12%-17.19%], e-waterpipe 18.7% [95% CI 6.43%-30.96%]).

Conclusion: A tobacco tax increase may lead to increased online interest in ENDS. Policymakers should concurrently educate the public about the harms associated with ENDS and promote evidence-based cessation aids. This may discourage both the initiation of ENDS and their use for smoking cessation while redirecting public interest toward medically recommended alternatives.

Keywords: electronic nicotine delivery systems; public health informatics; smoking cessation; tobacco cessation; tobacco control.

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Conflict of interest statement

The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Figures

Figure 1.
Figure 1.
Average Number of Points Awarded to Different Search Terms. Error Bars Indicate the Standard Error.
Figure 2.
Figure 2.
Word Clouds With the Frequency of Mentioning Depicted by Word Size. (A) Terms Linked to Smoking Cessation, (B) Terms Linked to Treatment Options, and (C) Tobacco Control Measures.
Figure 3.
Figure 3.
RSV During the Investigated Period With Fitted RSV Estimated by the ARIMA Model. The Dotted Lines Indicate the Day of Implementation for the Respective Intervention.
Figure 4.
Figure 4.
Change in RSV Regarding the Predefined Effect Periods. Errorbars Indicate the 95% CI.
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