Effects of front-of-package nutrition labelling systems on objective understanding and purchase intention in Panama: results from a multi-arm parallel-group randomised controlled trial.

Autor:	Gomes FS; Pan-American Health Organization (PAHO), Washington DC, USA., Ríos-Castillo I; Food and Agriculture Organization for the United Nations, Subregional Office for Mesoamerica, Panama City, Panama., Correa LRL; Fundación Movimiento de Alimentación Saludable, Panama City, Panama., Cruzado B; Fundación Movimiento de Alimentación Saludable, Panama City, Panama., Rojas CFU; Department of Design, University of Joinville Region, Joinville, Brazil.; Laboratory of Information Design Systems (LabDSI), Federal University of Paraná, Curitiba, Brazil., Ares Devincenzi G; Instituto Polo Tecnológico de Pando, Facultad de Química, Universidad de la República, Pando, Uruguay.; Centro de Investigación Básica en Psicología (CIBPsi), Facultad de Psicología, Universidad de la República, Montevideo, Uruguay., González-Madden E; Pan-American Health Organization (PAHO), Panama City, Panama., Victoria J; Pan-American Health Organization (PAHO), Panama City, Panama.
Jazyk:	angličtina
Zdroj:	Public health nutrition [Public Health Nutr] 2024 May 16; Vol. 27 (1), pp. e192. Date of Electronic Publication: 2024 May 16.
DOI:	10.1017/S1368980024001009
Abstrakt:	Objective: To assess the effect of different front-of-package labelling (FOPL) schemes on the objective understanding of the nutritional content and intention to purchase products, in Panama. Design: Single-blinded multi-arm parallel-group randomised controlled trial. Setting: Supermarkets across Panama. Participants were exposed to two-dimensional images of fifteen mock-up products presented at random and balanced orders. Participants assigned to the intervention groups were exposed to mock-ups featuring one FOPL scheme: black octagonal warning labels (OWL), traffic-light labelling (TFL) or guideline daily amounts (GDA). The control group was not exposed to any FOPL scheme. Participants: Adult supermarket shoppers ( n 1200). Participants were blinded to group assignment. Results: A similar number of participants were randomised and analysed in each group: OWL ( n 300), TFL ( n 300), GDA ( n 300) and control ( n 300). The odds of choosing to purchase the least harmful or none of the options more often was the highest in the OWL group. Compared with the control group, these odds were two times higher in the OWL group (OR 2·13, 95 % CI 1·60, 2·84) and 57 % higher in the TFL (1·57, 1·40-2·56), with no changes in the GDA (0·97, 0·73-1·29). OWL also resulted in the highest odds for correctly identifying the least harmful option and for correctly identifying a product with excessive amounts of sugars, sodium and/or saturated fats. Conclusions: OWL performed best in helping shoppers to correctly identify when a product contained excessive amounts of nutrients of concern, to correctly identify the least harmful option and to decide to purchase the least harmful or none of the options, more often.
Databáze:	MEDLINE
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