Murakami Kentaro, Sasaki Satoshi, Takahashi Yoshiko, Uenishi Kazuhiro
Department of Social and Preventive Epidemiology, School of Public Health, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan.
Public Health Nutr. 2009 Aug;12(8):1290-7. doi: 10.1017/S1368980008003923. Epub 2008 Nov 14.
All previous studies on monetary diet cost have examined the relationship of monetary cost of self-reported diet to self-reported, rather than biomarker-based, estimates of dietary intake. The present cross-sectional study examined the association between monetary costs of self-reported diet and biomarker-based estimates of nutrient intake.
Monetary diet cost (Japanese yen/1000 kJ) was calculated based on dietary intake information from a self-administered, comprehensive diet history questionnaire using retail food prices. Biomarker-based estimates of nutrient intake (percentage of energy for protein and mg/1000 kJ for K and Na) were estimated based on 24 h urinary excretion and estimated energy expenditure.
A total of fifteen universities and colleges in Japan.
A total of 1046 female Japanese dietetic students aged 18-22 years.
Total monetary diet cost showed a significant positive association with biomarker-based estimates of protein, K and Na. Vegetables and fish were not only the main contributors to total monetary diet cost (16.4 % and 15.5 %, respectively) but also were relatively strongly correlated with total monetary diet cost (Pearson's correlation coefficient: 0.70 and 0.68, respectively). Monetary cost of vegetables was significantly positively associated with all three nutrients, while that of fish showed a significant and positive association only with protein.
Total monetary cost of self-reported diet was positively associated with biomarker-based estimates of protein, K and Na intake in young Japanese women, and appeared mainly to be explained by the monetary costs of vegetables and fish.
以往所有关于饮食货币成本的研究都考察了自我报告饮食的货币成本与自我报告的而非基于生物标志物的饮食摄入量估计值之间的关系。本横断面研究考察了自我报告饮食的货币成本与基于生物标志物的营养素摄入量估计值之间的关联。
根据使用零售食品价格的自填式综合饮食史问卷中的饮食摄入信息计算饮食货币成本（日元/1000千焦）。基于24小时尿排泄量和估计能量消耗来估计基于生物标志物的营养素摄入量（蛋白质能量百分比以及钾和钠的毫克/1000千焦）。
日本的15所大学和学院。
1046名年龄在18 - 22岁的日本女性营养学专业学生。
饮食总货币成本与基于生物标志物的蛋白质、钾和钠估计值呈显著正相关。蔬菜和鱼类不仅是饮食总货币成本的主要贡献者（分别为16.4%和15.5%），而且与饮食总货币成本的相关性也相对较强（皮尔逊相关系数分别为0.70和0.68）。蔬菜的货币成本与所有三种营养素均呈显著正相关，而鱼类的货币成本仅与蛋白质呈显著正相关。
自我报告饮食的总货币成本与日本年轻女性基于生物标志物的蛋白质、钾和钠摄入量估计值呈正相关，且似乎主要由蔬菜和鱼类的货币成本所解释。
