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背景/目的:世界卫生大会建议应减少儿童暴露于不健康食物的几率。营养素度量法模型被用于定义儿童食品是否健康,并作为规范和限制广告的依据。但是,营养素度量法有几十种模型,这些模型的一致性目前还不明确。本研究的目的是测量8种营养素度量法的一致性,这8种营养素度量法都被用于规范儿童食物广告,如多少量和什么样的食物能够允许在电视台播放广告给儿童。材料/方法:收集2008年英国的儿童食品商业电视广告代表数据。该数据包括11763条广告336种不同的产品或品牌。此外,还通过公司网站、食品包装和食物成分表获得营养素数据,计算不同营养素度量法模型的评分。结果:不同营养素度量法模型允许的商业广告的比例从2.1%(0.4%,3.7%)至47.4%(42.1%,52.6%)。模型之间两两比较的一致性Kappa系数有一半都低于0.2,表明模型之间的一致性较差。结论:政策制定者在规范和管理儿童食品广告时,应慎重选用营养素度量法模型。
Background / Aims: The World Health Assembly recommends reducing the risk of children being exposed to unhealthy foods. Nutrient metrics are used to define the health of children’s foods and to serve as a basis for regulating and restricting advertisements. However, there are dozens of models of nutrient metrics and the consistency of these models is not yet clear. The purpose of this study was to measure the consistency of the eight nutrient measures that were used to regulate children’s food advertisements such as how much and what kind of food would allow advertisements to children on television. Materials / Methods: Collect data on commercial advertising on children’s food and commercial television in the UK in 2008. This statistic consists of 11763 advertisements 336 different products or brands. In addition, nutrient data were obtained from the company’s website, food packaging, and food composition tables to calculate scores for different nutrient metrics models. Results: The percentages of commercial ads allowed by the different nutrient metrics models ranged from 2.1% (0.4%, 3.7%) to 47.4% (42.1%, 52.6%). Half of the Kappa coefficients of pairwise comparisons between models were below 0.2, indicating poor agreement among the models. CONCLUSIONS: Policymakers should carefully select nutrient-metric models for regulating and managing children’s food advertisements.