Robust measures to reduce bias and improve methods are required The National Academy of Sciences (NAS) recently published two reports critiquing the process used to develop the US dietary guidelines.12 The reports identify important deficiencies in the process, including a lack of transparency in forming guideline committees, problems with the methods of systematic reviews underpinning guidelines, and a lack of clarity about how evidence is finally translated into public health recommendations. These deficiencies have received considerable attention already. Our recent analysis of the methods used to synthesise evidence and grade recommendations in 32 national food based dietary guidelines found similar problems, suggesting that improvements are required globally.3 The NAS reports’ headline recommendation is a complete redesign of the guideline development process into three steps conducted by separate groups. Federal staff and consultants would start by gathering data—conducting new systematic reviews and identifying existing reviews, meta-analyses, and descriptive datasets. A dietary guidelines scientific advisory committee would then evaluate and integrate all this evidence and develop recommendations for a scientific report. Finally, government employees would use this report …

中文翻译：

---

制定可靠的饮食指南

需要采取有力措施来减少偏见并改善方法美国国家科学院（NAS）最近发布了两份报告，这些报告对制定美国饮食指南的过程提出了批评。12这些报告指出了该过程中的重要缺陷，包括形成过程中缺乏透明度。指南委员会，支撑指南的系统审查方法存在问题，以及如何最终将证据最终转化为公共卫生建议尚不明确。这些缺陷已经受到相当多的关注。我们对32种基于国家食品的饮食指南中用于综合证据和等级建议的方法的最新分析发现了类似的问题，表明全球都需要改进。3 NAS报告的标题建议是对指南制定流程的完整重新设计，分为三个步骤，由不同的小组进行。联邦工作人员和顾问将从收集数据开始-进行新的系统评价并确定现有的评价，荟萃分析和描述性数据集。饮食指南科学咨询委员会随后将评估和整合所有这些证据，并为科学报告提出建议。最后，政府雇员将使用此报告... 饮食指南科学咨询委员会随后将评估和整合所有这些证据，并为科学报告提出建议。最后，政府雇员将使用此报告... 饮食指南科学咨询委员会随后将评估和整合所有这些证据，并为科学报告提出建议。最后，政府雇员将使用此报告...