Timon Claire M, Astell Arlene J, Hwang Faustina, Adlam Tim D, Smith Tom, Maclean Lin, Spurr Daynor, Forster Sarah E, Williams Elizabeth A
UCD Institute of Food and Health, University College Dublin,Belfield,Dublin 4,Republic of Ireland.
Faculty of Medicine, Dentistry and Health, School of Health and Related Research, University of Sheffield,SheffieldS1 4DA,UK.
Br J Nutr. 2015 Feb 28;113(4):654-64. doi: 10.1017/S0007114514003808. Epub 2015 Jan 29.
Dietary assessment in older adults can be challenging. The Novel Assessment of Nutrition and Ageing (NANA) method is a touch-screen computer-based food record that enables older adults to record their dietary intakes. The objective of the present study was to assess the relative validity of the NANA method for dietary assessment in older adults. For this purpose, three studies were conducted in which a total of ninety-four older adults (aged 65-89 years) used the NANA method of dietary assessment. On a separate occasion, participants completed a 4 d estimated food diary. Blood and 24 h urine samples were also collected from seventy-six of the volunteers for the analysis of biomarkers of nutrient intake. The results from all the three studies were combined, and nutrient intake data collected using the NANA method were compared against the 4 d estimated food diary and biomarkers of nutrient intake. Bland-Altman analysis showed a reasonable agreement between the dietary assessment methods for energy and macronutrient intake; however, there were small, but significant, differences for energy and protein intake, reflecting the tendency for the NANA method to record marginally lower energy intakes. Significant positive correlations were observed between urinary urea and dietary protein intake using both the NANA and the 4 d estimated food diary methods, and between plasma ascorbic acid and dietary vitamin C intake using the NANA method. The results demonstrate the feasibility of computer-based dietary assessment in older adults, and suggest that the NANA method is comparable to the 4 d estimated food diary, and could be used as an alternative to the food diary for the short-term assessment of an individual's dietary intake.
对老年人进行膳食评估具有挑战性。新型营养与衰老评估（NANA）方法是一种基于触摸屏电脑的食物记录方式，能让老年人记录自己的膳食摄入量。本研究的目的是评估NANA方法在老年人膳食评估中的相对效度。为此，开展了三项研究，共有94名老年人（年龄在65 - 89岁之间）使用NANA膳食评估方法。在另一个时间点，参与者完成了一份为期4天的估计食物日记。还从76名志愿者身上采集了血液和24小时尿液样本，用于分析营养摄入的生物标志物。将三项研究的结果合并，把使用NANA方法收集的营养摄入数据与为期4天的估计食物日记以及营养摄入生物标志物进行比较。布兰德 - 奥特曼分析表明，在能量和宏量营养素摄入的膳食评估方法之间存在合理的一致性；然而，能量和蛋白质摄入存在微小但显著的差异，这反映出NANA方法记录的能量摄入量略低的趋势。使用NANA方法和为期4天的估计食物日记方法，均观察到尿尿素与膳食蛋白质摄入量之间以及使用NANA方法时血浆维生素C与膳食维生素C摄入量之间存在显著的正相关。结果证明了基于计算机的膳食评估在老年人中的可行性，并表明NANA方法与为期4天的估计食物日记相当，可作为食物日记的替代方法用于短期评估个体的膳食摄入量。
