Why nutritionists measure diary intake

1. Why do nutritionists measure diary intake? 2. How is energy and nutrient intake measured? 3. Why is it important that data on food, energy and nutrient intake is a valid representation of habitual dietary intake? 4. What random and systematic errors are associated with the measurement of energy and nutrient intake? 5. How has the validity of dietary intake data been called into question? 6. What methods can be used to identify mis-reporting of dietary intake? 7. What are the relative merits/disadvantages of these validation tools? 8. What proportion of subjects have been identified as mis-reporters in recent dietary intake studies? Find at least 3 studies that have reported on levels of mis-reporting. 9. Compare the levels of mis-reporting amongst male and female subjects in these studies. 10. What characteristics have researchers found to be associated with mis-reporting? 11. Are all nutrients mis-reported to the same degree? 12. What should be done with the data of subjects who are identified as mis-reporters? 13. How can nutritionists collect more valid data about habitual energy and nutrient intake?