The National Cancer Institute (NCI) Food Reporting and Comparison Study (FORCS) compares nutrient and food group estimates obtained from recalls collected through the web-based Automated Self-Administered 24-hour Recall (ASA24) to those from standard interviewer-administered telephone recalls among 1054 adults. Within the ASA24 software, respondents may choose to enter open-ended text to report “unfound food” and “other, specify.” Respondents use the“unfound food” field to report a food or drink they cannot find; the ASA24 system then asks a series of general questions to better identify the food. Respondents use the “other, specify” field to provide food details, such as brand name or cooking method, that differ from the responses offered by ASA24. When respondents use these two open-ended text fields, the system assigns default food codes. Nutritionists reviewed these codes and assigned new codes when appropriate. Nutrient and My Pyramid Equivalent (MPE) values from default food codes (unedited) andthe researcher assigned food codes (edited)were compared. Of the 716 food codes evaluated, changes were made to 248 foods (1.5% of total foods reported) which affected 194 (19.1%) of all recalls and required over 60 hours of specialized staff time. Although 43% of the 1013 completed recalls included at least one of the two text field responses, the ASA24 systemassigned acceptable default food codes 68% of the time.Editing did not significantly affect the means and ranking for most nutrients and food group MPE values; correlation coefficients for energy and macronutrient values before and after editing were 0.95 or higher, suggesting that this editingmaynot be necessary for most large studies using ASA24. 相似文献
Background: Dietary patterns are often considered as one of the main causes of non-communicable diseases worldwide. It is of utmost importance to study dietary habits in developing countries since this work is scarce.
Objective: To summarize the most recent research conducted in this field in African countries, namely the most used methodologies and tools.
Methods: A systematic review was conducted on MEDLINE®/PubMed, aiming to identify scientific publications focused on studies of dietary intake of different African populations, in a ten-year period. Papers not written in English/Portuguese/Spanish, studies developed among African people but not developed in African countries, studies aiming to assess a particular nutrient/specific food/food toxin and studies that assessed dietary intake among children were excluded.
Findings: Out of 99 included studies, the 24-hour recall and the food-frequency questionnaire were the most used dietary intake assessment tools, used to assess diet at an individual level. It was also observed that often country-unspecific food composition databases are used, and the methodologies employed are poorly validated and standardized.
Conclusions: There is an emergent need to improve the existing food databases by updating food data and to develop suitable country-specific databases for those that do not have their own food composition table. 相似文献
Tracking systems have been widely used to resolve the issues of product recall and food safety. Thus far, few researches have been done on designing the tracking capability from the perspective of supply chain. In this paper, using the traceable unit size at the manufacturer level to measure the tracking capability, we propose a non-convex non-linear programming to jointly optimise the tracking capability and price considering the tracking cost and recall cost in a supply chain with endogenous pricing. Results show that, in both centralised and decentralised supply chains, there is a unique tracking capability and retailing/wholesale price with closed-form solutions to optimise the supply chain profit. When the cost ratio (unit tracking cost/unit recall cost) is sufficiently large and small, the optimal tracking strategy is barcode tracking and unit tracking, respectively, and otherwise, the optimal tracking strategy is batch tracking with an economic traceable unit size which depends on the cost ratio, quality inspection threshold, supply defection rate and the supplier’s tracking capability. Furthermore, in the context of large and small cost ratio, we find that improving tracking capability will enlarge and mitigate the effect of double marginalisation, respectively. In particular, we find that the strict tracking regulation policy is more robust than the subsidy policy to improve the supply chain tracking capability. 相似文献
Intense pain is often exaggerated in retrospective evaluations, indicating a possible divergence between experience and memory. However, little is known regarding how people retrospectively evaluate experiences with both pleasant and unpleasant aspects. The Day Reconstruction Method (DRM; Kahneman. Krueger, Schkade, Schwarz, & Stone, 2004b) provides a unique opportunity to examine memory-experience gaps in recollections of individual days, which elicit a wide gamut of emotions. We asked female participants (N = 810, Study 1, and N = 615, Study 2) to reconstruct episodes of the previous day using the DRM and demonstrated that memory and experience diverge for both pleasant and unpleasant emotions. When they rated their day overall in a retrospectively evaluative frame of mind, the participants recalled more unpleasant and pleasant emotions than they reported feeling during the individual episodes, with a larger gap for unpleasant emotions than for pleasant emotions. The findings suggest that separate processes are used for committing positive and negative events to memory and that, especially when unpleasant emotions are involved, prudence is favored over accuracy. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
We often experience intense emotions when we enter fictional worlds in film and literature and often shed real tears. The goal of this study was to determine whether emotional reactions (sadness and anxiety) to fiction are distinguishable from emotional reactions to fact. Fifty-nine young adults rated their sadness and anxiety levels in response to 4 film clips, 2 presented as fiction, 2 as nonfiction, and in response to the recall of an actual sad event personally experienced. Participants experienced equivalent levels of sadness and anxiety in response to films presented as fictional or factual. They also experienced equivalent levels of sadness in response to films and in response to a sad personal event. Anxiety levels, however, were significantly higher in response to personally experienced events. The fact that sadness elicited by films is unadulterated by the anxiety that accompanies the sadness of personal experience may explain, in part, the pleasure we derive from watching sad films. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献