NUTR-2160 Lecture 4: Dietary Assessment
Document Summary
Dietary assessment evaluation of a person"s usual food intake. Infinite combinations of food and recipes, with large variations within and between individuals eating over the whole life span: several thousand chemicals present in the diet may have complex synergistic or antagonistic bioactive effects. Measurement errors in dietary intake usual intake is not directly observable but can be estimated from self-reported actual intakes. Underreporting: occurs anywhere from 10 to 45% in dietary recalls, prevalent in obese/low socioeconomic status individuals, underrepoting caused by wanting to be socially accepted, people usually underreport foods they feel guilty about eating. Traditional dietary assessment instruments two classifications criteria include: duration of assessment and time frame of data collected. Records: observation fieldworkers visit homes or schools to observe meal times and record dietary intake, advantages: Used as a reference method for validating other dietary assessment methods. Does not affect eating behavior: disadvantages:
