Design and methods for testing a simple dietary message to improve weight loss and dietary quality
Design and methods for testing a simple dietary message to improve weight loss and dietary quality
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DOI：
10.1186/1471-2288-9-87
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发表时间：
2009-12-30
影响因子：
4
通讯作者：
Pagoto, Sherry L.
中科院分区：
文献类型：
--
作者：
Merriam, Philip A.;Ma, Yunsheng;Pagoto, Sherry L.
背景：目前的食物金字塔指南因其复杂性和用户理解建议所需的知识而受到批评。将饮食信息简化为专注于饮食质量的单一关键方面，例如纤维摄入量，可能使信息更容易理解和坚持，从而使受访者能够实现更大的体重减轻，更好的饮食质量和整体代谢健康。方法和设计：这是一项随机对照临床试验，有两个相同大小的组。总共240名符合代谢综合征诊断标准的肥胖成年人将被随机分为两组：1)高纤维饮食和2)美国心脏协会（AHA）饮食。在高纤维饮食条件下，患者只会被告知每天摄入30克或更多的膳食纤维。在美国心脏协会饮食条件下，患者将被指导进行美国心脏协会2006指南推荐的几种饮食改变。该试验检查了参与者的体重减轻和饮食质量，以及代谢综合征成分、炎症生物标志物、低密度脂蛋白胆固醇水平、胰岛素水平和糖化血红蛋白的变化。潜在的中介因素，即饮食依从性和饮食的感知易用性，以及对体重变化的干预效果也将被检查。讨论：本文的目的是概述研究设计和方法，以测试增加膳食纤维的简单信息。如果发现简单的饮食方法对减肥有效；并且，改善饮食质量，代谢健康和依从性，它可以用来发展一个简单的公共卫生信息。
Background: The current food pyramid guidelines have been criticized because of their complexity and the knowledge required for users to understand the recommendations. Simplification of a dietary message to focus on a single key aspect of dietary quality, e. g., fiber intake, may make the message much easier to comprehend and adhere, such that respondents can achieve greater weight loss, better dietary quality and overall metabolic health.Methods and design: This is a randomized controlled clinical trial with two equal sized arms. In total, 240 obese adults who meet diagnostic criteria for the metabolic syndrome will be randomized to one of the two conditions: 1) a high fiber diet and 2) the American Heart Association (AHA) diet. In the high fiber diet condition, patients will be given instruction only on achieving daily dietary fiber intake of 30 g or more. In the AHA diet condition, patients will be instructed to make the several dietary changes recommended by the AHA 2006 guidelines. The trial examines participant weight loss and dietary quality as well as changes in components of the metabolic syndrome, inflammatory biomarkers, low-density lipoprotein cholesterol levels, insulin levels, and glycosolated hemoglobin. Potential mediators, i.e., diet adherence and perceived ease of the diet, and the intervention effect on weight change will also be examined.Discussions: The purpose of this paper is to outline the study design and methods for testing the simple message of increasing dietary fiber. If the simple dietary approach is found efficacious for weight loss; and, improves dietary quality, metabolic health, and adherence, it might then be used to develop a simple public health message.