Changes in household purchasing of soft drinks following the UK soft drinks industry levy by household income and composition: controlled interrupted time series analysis, March 2014 to November 2019
Background The WHO recommends taxes on sugar sweetened beverages (SSBs) to improve population health. We examined changes in volume of and amount of sugar in purchases of soft drinks according to household income and composition, 19 months following the implementation of the UK soft drinks industry...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMJ Publishing Group
|
| Series: | BMJ Nutrition, Prevention & Health |
| Online Access: | https://nutrition.bmj.com/content/early/2025/01/16/bmjnph-2024-000981.full |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841525736998961152 |
|---|---|
| author | Jean Adams Martin White Stephen J Sharp Harry Rutter David Pell Steven Cummins Richard D Smith Nina Trivedy Rogers |
| author_facet | Jean Adams Martin White Stephen J Sharp Harry Rutter David Pell Steven Cummins Richard D Smith Nina Trivedy Rogers |
| author_sort | Jean Adams |
| collection | DOAJ |
| description | Background The WHO recommends taxes on sugar sweetened beverages (SSBs) to improve population health. We examined changes in volume of and amount of sugar in purchases of soft drinks according to household income and composition, 19 months following the implementation of the UK soft drinks industry levy.Methods Data were from the Kantar Fast Moving Consumer Goods panel, a market research panel which collects data on weekly household purchases (mean weekly number of households=21 908), March 2014–November 2019. Interrupted time series analysis of volume and sugar purchases was used to estimate absolute and relative differences in the volume and amount of sugar in soft drinks, confectionery and alcohol purchased weekly by household income (<£20 000, £20–50 000 or >£50 000) and composition (presence of children (<16 years) in the household (yes or no)), 19 months after soft drinks industry levy (SDIL) implementation, compared with the counterfactual scenario based on pre-announcement trends and using a control group (toiletries).Results By November 2019, purchased weekly sugar in soft drinks fell by 7.46 g (95% CI: 12.05, 2.87) per household but volumes of drinks purchased remained unchanged, compared with the counterfactual. In low-income households, weekly sugar purchased in soft drinks decreased by 14.0% (95% CI: 12.1, 15.9) compared with the counterfactual but in high-income households increased by 3.4% (1.07, 5.75). Among households with children, sugar purchased decreased by 13.7% (12.1, 15.3) but increased in households without children by 5.0% (3.0, 7.0). Low-income households and those with children also reduced their weekly volume of soft drinks purchased by 5.7% (3.7, 7.7) and 8.5% (6.8, 10.2) respectively. There was no evidence of substitution to confectionary or alcohol.Conclusion In the second year following implementation of the SDIL, effects on sugar purchased were greatest in those with the highest pre-SDIL purchasing levels (low-income households and those with children). The SDIL may contribute to reducing dietary inequalities.Trial registration number ISRCTN18042742. Registered: August 2017. |
| format | Article |
| id | doaj-art-dd593a30004b409f9241b5fa5a7424f5 |
| institution | Kabale University |
| issn | 2516-5542 |
| language | English |
| publisher | BMJ Publishing Group |
| record_format | Article |
| series | BMJ Nutrition, Prevention & Health |
| spelling | doaj-art-dd593a30004b409f9241b5fa5a7424f52025-01-17T07:30:10ZengBMJ Publishing GroupBMJ Nutrition, Prevention & Health2516-554210.1136/bmjnph-2024-000981Changes in household purchasing of soft drinks following the UK soft drinks industry levy by household income and composition: controlled interrupted time series analysis, March 2014 to November 2019Jean Adams0Martin White1Stephen J Sharp2Harry Rutter3David Pell4Steven Cummins5Richard D Smith6Nina Trivedy Rogers71 MRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, University of Cambridge, Cambridge, UKMRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, University of Cambridge, Cambridge, UKsenior statisticianDepartment of Social and Policy Sciences, , University of Bath, Bath, UKresearch associateDepartment of Public Health, Environments & Society, London School of Hygiene & Tropical Medicine, London, UKprofessorMRC Epidemiology Unit, University of Cambridge School of Clinical Medicine, Institute of Metabolic Science, Cambridge Biomedical Campus, University of Cambridge, Cambridge, UKBackground The WHO recommends taxes on sugar sweetened beverages (SSBs) to improve population health. We examined changes in volume of and amount of sugar in purchases of soft drinks according to household income and composition, 19 months following the implementation of the UK soft drinks industry levy.Methods Data were from the Kantar Fast Moving Consumer Goods panel, a market research panel which collects data on weekly household purchases (mean weekly number of households=21 908), March 2014–November 2019. Interrupted time series analysis of volume and sugar purchases was used to estimate absolute and relative differences in the volume and amount of sugar in soft drinks, confectionery and alcohol purchased weekly by household income (<£20 000, £20–50 000 or >£50 000) and composition (presence of children (<16 years) in the household (yes or no)), 19 months after soft drinks industry levy (SDIL) implementation, compared with the counterfactual scenario based on pre-announcement trends and using a control group (toiletries).Results By November 2019, purchased weekly sugar in soft drinks fell by 7.46 g (95% CI: 12.05, 2.87) per household but volumes of drinks purchased remained unchanged, compared with the counterfactual. In low-income households, weekly sugar purchased in soft drinks decreased by 14.0% (95% CI: 12.1, 15.9) compared with the counterfactual but in high-income households increased by 3.4% (1.07, 5.75). Among households with children, sugar purchased decreased by 13.7% (12.1, 15.3) but increased in households without children by 5.0% (3.0, 7.0). Low-income households and those with children also reduced their weekly volume of soft drinks purchased by 5.7% (3.7, 7.7) and 8.5% (6.8, 10.2) respectively. There was no evidence of substitution to confectionary or alcohol.Conclusion In the second year following implementation of the SDIL, effects on sugar purchased were greatest in those with the highest pre-SDIL purchasing levels (low-income households and those with children). The SDIL may contribute to reducing dietary inequalities.Trial registration number ISRCTN18042742. Registered: August 2017.https://nutrition.bmj.com/content/early/2025/01/16/bmjnph-2024-000981.full |
| spellingShingle | Jean Adams Martin White Stephen J Sharp Harry Rutter David Pell Steven Cummins Richard D Smith Nina Trivedy Rogers Changes in household purchasing of soft drinks following the UK soft drinks industry levy by household income and composition: controlled interrupted time series analysis, March 2014 to November 2019 BMJ Nutrition, Prevention & Health |
| title | Changes in household purchasing of soft drinks following the UK soft drinks industry levy by household income and composition: controlled interrupted time series analysis, March 2014 to November 2019 |
| title_full | Changes in household purchasing of soft drinks following the UK soft drinks industry levy by household income and composition: controlled interrupted time series analysis, March 2014 to November 2019 |
| title_fullStr | Changes in household purchasing of soft drinks following the UK soft drinks industry levy by household income and composition: controlled interrupted time series analysis, March 2014 to November 2019 |
| title_full_unstemmed | Changes in household purchasing of soft drinks following the UK soft drinks industry levy by household income and composition: controlled interrupted time series analysis, March 2014 to November 2019 |
| title_short | Changes in household purchasing of soft drinks following the UK soft drinks industry levy by household income and composition: controlled interrupted time series analysis, March 2014 to November 2019 |
| title_sort | changes in household purchasing of soft drinks following the uk soft drinks industry levy by household income and composition controlled interrupted time series analysis march 2014 to november 2019 |
| url | https://nutrition.bmj.com/content/early/2025/01/16/bmjnph-2024-000981.full |
| work_keys_str_mv | AT jeanadams changesinhouseholdpurchasingofsoftdrinksfollowingtheuksoftdrinksindustrylevybyhouseholdincomeandcompositioncontrolledinterruptedtimeseriesanalysismarch2014tonovember2019 AT martinwhite changesinhouseholdpurchasingofsoftdrinksfollowingtheuksoftdrinksindustrylevybyhouseholdincomeandcompositioncontrolledinterruptedtimeseriesanalysismarch2014tonovember2019 AT stephenjsharp changesinhouseholdpurchasingofsoftdrinksfollowingtheuksoftdrinksindustrylevybyhouseholdincomeandcompositioncontrolledinterruptedtimeseriesanalysismarch2014tonovember2019 AT harryrutter changesinhouseholdpurchasingofsoftdrinksfollowingtheuksoftdrinksindustrylevybyhouseholdincomeandcompositioncontrolledinterruptedtimeseriesanalysismarch2014tonovember2019 AT davidpell changesinhouseholdpurchasingofsoftdrinksfollowingtheuksoftdrinksindustrylevybyhouseholdincomeandcompositioncontrolledinterruptedtimeseriesanalysismarch2014tonovember2019 AT stevencummins changesinhouseholdpurchasingofsoftdrinksfollowingtheuksoftdrinksindustrylevybyhouseholdincomeandcompositioncontrolledinterruptedtimeseriesanalysismarch2014tonovember2019 AT richarddsmith changesinhouseholdpurchasingofsoftdrinksfollowingtheuksoftdrinksindustrylevybyhouseholdincomeandcompositioncontrolledinterruptedtimeseriesanalysismarch2014tonovember2019 AT ninatrivedyrogers changesinhouseholdpurchasingofsoftdrinksfollowingtheuksoftdrinksindustrylevybyhouseholdincomeandcompositioncontrolledinterruptedtimeseriesanalysismarch2014tonovember2019 |