Evidence map›Paper›PMID 33407283›Full record

ArticleBMC public health2021

The impact of celebrity influence and national media coverage on users of an alcohol reduction app: a natural experiment.

Claire Garnett, Olga Perski, Emma Beard, Susan Michie, Robert West, Jamie Brown

Open access · goldAbstract read
In one paragraph

Article in BMC public health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
3.8field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

7 citing papers in PubMed, 12 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Claire GarnettDepartment of Behavioural Science and Health, University College London, London, WC1E 7HB, UK. c.garnett@ucl.ac.uk.ORCID 0000-0002-6589-299X
Olga PerskiDepartment of Behavioural Science and Health, University College London, London, WC1E 7HB, UK.
Emma BeardDepartment of Behavioural Science and Health, University College London, London, WC1E 7HB, UK.
Susan MichieDepartment of Clinical, Educational and Health Psychology, University College London, London, WC1E 6BT, UK.
Robert WestDepartment of Behavioural Science and Health, University College London, London, WC1E 7HB, UK.
Jamie BrownDepartment of Behavioural Science and Health, University College London, London, WC1E 7HB, UK.
University College London · GB

Funding

Cancer Research UK 22962Cancer Research UK C1417/A22962
6 · The paper itself

Abstract

backgroundSmartphone apps are increasingly used for health-related behaviour change and people discover apps through different sources. However, it is unclear whether users differ by mode of app discovery. Drink Less is an alcohol reduction app that received national media coverage in the UK caused by celebrity influence (a male TV and radio national broadcaster, aged 51). Our aim was to compare users who discovered the app before and after this coverage.

methodsA natural experiment assessing the impact of media coverage of Drink Less on users' socio-demographic and drinking characteristics, app engagement levels, and extent of alcohol reduction. The study period was from 17th May 2017 to 23rd January 2019, with media coverage starting on 21st August 2018. Users were 18 years or over, based in the UK and interested in drinking less. Interrupted time series analyses using Generalised Additive Mixed Models were conducted for each outcome variable aggregated at the weekly level.

resultsIn 66 weeks prior to the media coverage, 8617 users downloaded the app and 18,959 in 23 weeks afterwards. There was a significant step-level increase in users' mean age (B = 8.17, p < .001) and a decrease in the percentage of female users (B = -27.71, p < .001), though these effects dissipated non-linearly over time. No effect of media coverage was detected on employment type or on the percentage of at-risk drinkers, though the mean Alcohol Use Disorders Identification Test score was lower after the media coverage (B = -1.43, p = .031). There was a step-level increase in app engagement - number of sessions (B = 3.45, p = .038) and number of days used (B = 2.30, p = .005) - which continued to increase over time following quadratic trends.

conclusionsCelebrity influence leading to national media coverage in the UK of the Drink Less app was associated with more people downloading the app who were male, older and engaged with the app; and did not appear to impact employment inequality.

Indexed as

AlcoholismMobile ApplicationsAlcohol DrinkingFemaleHumansInterrupted Time Series AnalysisMaleMiddle AgedSmartphoneAlcoholCelebrityDrinkingEndorsementEngagementSmartphone appUser characteristics

Identifiers

PMID33407283
PMCPMC7789329
OpenAlexW3119763435

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.