Department of Agriculture (USDA) Food Surveys Research Group (FSRG) review questionable items reported in the dietary interviews. In order to make sure that the food and beverage intake files and DS intake files do not contain any overlapping products, trained nutritionists at the National Center for Health Statistics (NCHS) and U.S. This documentation applies to all files.ĭistinguishing Between Foods/Beverages and Dietary Supplements in NHANESĭistinguishing between foods/beverages and dietary supplements can be challenging. Each dietary supplement data file is accompanied by codebook and frequencies. Similar to the format of food and beverage intake files, two types of dietary supplement intake data are available from the two dietary interviews for the 2015-2016 survey cycle: Individual Dietary Supplements files and Total Dietary Supplements files. The first dietary recall interview is collected in-person in the Mobile Examination Center (MEC) and the second interview is collected by telephone 3 to 10 days later. The improved nutrient estimates increase researchers’ ability to examine nutrient-disease or nutrient-health associations and to estimate percentages of the population with intakes over or under various nutrient standards.Īll NHANES participants are eligible for two 24-hour dietary recall interviews. This allows researchers to improve the total nutrient intake estimations as well as examine associations by nutrient source, such as from foods versus supplements. These data are now collected using similar methods over the same period therefore, nutrients from all sources can be easily combined. However, prior to the 2007-2008 data release, estimating total nutrient intakes from all sources (foods, beverages and DS), was difficult because of the different data collection methods, referent time frames, and data formats. Since 1999, NHANES has been collecting data on participants’ use of dietary supplements, in the past 30 days, during the Dietary Supplements Use Section (DSQ) in the household interview. Since 2007, data has been collected on the usage of all vitamins, minerals, herbals and other dietary supplements as well as non-prescription antacids, as part of the dietary interview, directly following the collection of dietary intake from foods and beverages. From 1999-2006, the 24-hour dietary recall interviews, or dietary interviews, only asked about food and beverages consumed. The objective of the 24-hour dietary supplement use component is to obtain information from NHANES participants on the types and amounts of dietary supplements (DS) consumed during the 24-hour period prior to the interview (midnight to midnight) and to estimate the intake of nutrients from those dietary supplements. This documentation describes the data files associated only with the collection of dietary supplements and non-prescription antacid use. The objective of the dietary interview component is to obtain detailed dietary intake information from NHANES participants.
0 Comments
Leave a Reply. |