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dc.contributor.authorYau, Amy
dc.contributor.authorBerger, Nicolas
dc.contributor.authorLaw, Cherry
dc.contributor.authorCornelsen, Laura
dc.contributor.authorGreener, Robert
dc.contributor.authorAdams, Jean
dc.contributor.authorBoyland, Emma J.
dc.contributor.authorBurgoine, Thomas
dc.contributor.authorde Vocht, Frank
dc.contributor.authorEgan, Matt
dc.contributor.authorEr, Vanessa
dc.contributor.authorLake, Amelia A.
dc.contributor.authorLock, Karen
dc.contributor.authorMytton, Oliver
dc.contributor.authorPetticrew, Mark
dc.contributor.authorThompson, Claire
dc.contributor.authorWhite, Martin
dc.contributor.authorCummins, Steven
dc.contributor.editorPopkin, Barry M.
dc.date.accessioned2022-02-18T12:45:01Z
dc.date.available2022-02-18T12:45:01Z
dc.date.issued2022-02-17
dc.identifier.citationYau , A , Berger , N , Law , C , Cornelsen , L , Greener , R , Adams , J , Boyland , E J , Burgoine , T , de Vocht , F , Egan , M , Er , V , Lake , A A , Lock , K , Mytton , O , Petticrew , M , Thompson , C , White , M , Cummins , S & Popkin , B M (ed.) 2022 , ' Changes in household food and drink purchases following restrictions on the advertisement of high fat, salt, and sugar products across the Transport for London network: A controlled interrupted time series analysis ' , PLoS Medicine , vol. 19 , no. 2 , e1003915 . https://doi.org/10.1371/journal.pmed.1003915
dc.identifier.issn1549-1277
dc.identifier.otherJisc: 96035
dc.identifier.otherpublisher-id: pmedicine-d-21-04172
dc.identifier.otherORCID: /0000-0002-0864-9811/work/108467595
dc.identifier.urihttp://hdl.handle.net/2299/25389
dc.description© 2022 Yau et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, https://creativecommons.org/licenses/by/4.0/
dc.description.abstractBackground: Restricting the advertisement of products with high fat, salt, and sugar (HFSS) content has been recommended as a policy tool to improve diet and tackle obesity, but the impact on HFSS purchasing is unknown. This study aimed to evaluate the impact of HFSS advertising restrictions, implemented across the London (UK) transport network in February 2019, on HFSS purchases. Methods and findings: Over 5 million take-home food and drink purchases were recorded by 1,970 households (London [intervention], n = 977; North of England [control], n = 993) randomly selected from the Kantar Fast Moving Consumer Goods panel. The intervention and control samples were similar in household characteristics but had small differences in main food shopper sex, socioeconomic position, and body mass index. Using a controlled interrupted time series design, we estimated average weekly household purchases of energy and nutrients from HFSS products in the post-intervention period (44 weeks) compared to a counterfactual constructed from the control and pre-intervention (36 weeks) series. Energy purchased from HFSS products was 6.7% (1,001.0 kcal, 95% CI 456.0 to 1,546.0) lower among intervention households compared to the counterfactual. Relative reductions in purchases of fat (57.9 g, 95% CI 22.1 to 93.7), saturated fat (26.4 g, 95% CI 12.4 to 40.4), and sugar (80.7 g, 95% CI 41.4 to 120.1) from HFSS products were also observed. Energy from chocolate and confectionery purchases was 19.4% (317.9 kcal, 95% CI 200.0 to 435.8) lower among intervention households than for the counterfactual, with corresponding relative reductions in fat (13.1 g, 95% CI 7.5 to 18.8), saturated fat (8.7 g, 95% CI 5.7 to 11.7), sugar (41.4 g, 95% CI 27.4 to 55.4), and salt (0.2 g, 95% CI 0.1 to 0.2) purchased from chocolate and confectionery. Relative reductions are in the context of secular increases in HFSS purchases in both the intervention and control areas, so the policy was associated with attenuated growth of HFSS purchases rather than absolute reduction in HFSS purchases. Study limitations include the lack of out-of-home purchases in our analyses and not being able to assess the sustainability of observed changes beyond 44 weeks. Conclusions: This study finds an association between the implementation of restrictions on outdoor HFSS advertising and relative reductions in energy, sugar, and fat purchased from HFSS products. These findings provide support for policies that restrict HFSS advertising as a tool to reduce purchases of HFSS products.en
dc.format.extent23
dc.format.extent1217231
dc.language.isoeng
dc.relation.ispartofPLoS Medicine
dc.subjectResearch Article
dc.subjectSocial sciences
dc.subjectBiology and life sciences
dc.subjectMedicine and health sciences
dc.titleChanges in household food and drink purchases following restrictions on the advertisement of high fat, salt, and sugar products across the Transport for London network: A controlled interrupted time series analysisen
dc.contributor.institutionSchool of Health and Social Work
dc.contributor.institutionCentre for Research in Public Health and Community Care
dc.contributor.institutionCommunities, Young People and Family Lives
dc.description.statusPeer reviewed
rioxxterms.versionofrecord10.1371/journal.pmed.1003915
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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