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Background <p>Temporary Abstinence Challenges (TAC), such as Dry January, are widely implemented public health initiatives and have been associated with short- and medium-term reductions in alcohol consumption. Smartphone applications are increasingly recommended to support participation, yet little is known about real-world user engagement and day-to-day drinking trajectories during these campaigns. This study examined patterns of app use, retention, and alcohol consumption among users of a smartphone application during the 2024 national “Défi de janvier” campaign in France.</p> Methods <p>We conducted an observational analysis of anonymized, app-based self-reported data collected between 1 and 31 January 2024. Daily alcohol consumption and engagement were analyzed among 2,032 adult users according to age, sex, and baseline World Health Organization (WHO) drinking-risk level assessed during a reference week preceding the campaign. User retention was examined using Cox proportional hazards models, and changes in alcohol consumption were analyzed using daily trajectories and linear mixed-effects models.</p> Results <p>Higher baseline WHO drinking-risk levels and younger age were independently associated with lower retention, whereas sex and binge drinking during the reference week were not. Across all drinking-risk groups of users who remained engaged, alcohol consumption followed a stable weekly pattern with peaks on Fridays and Saturdays. Among users with available data over time, mean self-reported daily alcohol consumption decreased over January across baseline risk categories. Absolute reductions were greatest among users with higher baseline consumption, while individuals with lower-risk drinking showed smaller but consistent decreases.</p> Conclusions <p>In this large real-world sample of smartphone application users participating in a national temporary abstinence challenge, alcohol consumption declined among users who remained engaged and across all baseline drinking-risk levels, despite substantial variability in user retention. These findings provide real-world evidence on engagement patterns and self-reported drinking trajectories among users of a digital tool during a national Temporary Abstinence Challenge, and highlight opportunities to optimize future interventions, particularly for younger users and those with higher baseline drinking levels.</p>

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Daily alcohol consumption trajectories and user retention during a national temporary abstinence campaign: real-world data from a smartphone application

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月18日

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  • Mickael Naassila,
  • Nicolas Simon,
  • Judith André,
  • Méléna Dreinaza,
  • Raphaël Trouillet,
  • Amine Benyamina,
  • Bernard Basset,
  • Laure Grellet,
  • Pascal Perney

摘要

Background

Temporary Abstinence Challenges (TAC), such as Dry January, are widely implemented public health initiatives and have been associated with short- and medium-term reductions in alcohol consumption. Smartphone applications are increasingly recommended to support participation, yet little is known about real-world user engagement and day-to-day drinking trajectories during these campaigns. This study examined patterns of app use, retention, and alcohol consumption among users of a smartphone application during the 2024 national “Défi de janvier” campaign in France.

Methods

We conducted an observational analysis of anonymized, app-based self-reported data collected between 1 and 31 January 2024. Daily alcohol consumption and engagement were analyzed among 2,032 adult users according to age, sex, and baseline World Health Organization (WHO) drinking-risk level assessed during a reference week preceding the campaign. User retention was examined using Cox proportional hazards models, and changes in alcohol consumption were analyzed using daily trajectories and linear mixed-effects models.

Results

Higher baseline WHO drinking-risk levels and younger age were independently associated with lower retention, whereas sex and binge drinking during the reference week were not. Across all drinking-risk groups of users who remained engaged, alcohol consumption followed a stable weekly pattern with peaks on Fridays and Saturdays. Among users with available data over time, mean self-reported daily alcohol consumption decreased over January across baseline risk categories. Absolute reductions were greatest among users with higher baseline consumption, while individuals with lower-risk drinking showed smaller but consistent decreases.

Conclusions

In this large real-world sample of smartphone application users participating in a national temporary abstinence challenge, alcohol consumption declined among users who remained engaged and across all baseline drinking-risk levels, despite substantial variability in user retention. These findings provide real-world evidence on engagement patterns and self-reported drinking trajectories among users of a digital tool during a national Temporary Abstinence Challenge, and highlight opportunities to optimize future interventions, particularly for younger users and those with higher baseline drinking levels.