Chapter 3 Measuring Diet PDF

Chapter 3 Measuring Diet ©David C. Nieman Chapter 3 Outline 1. Reasons for Measuring Diet 2. Techniques in Measuring Diet 3. Considerations for Certain Groups 4. Issues in Dietary Measurement ©liquidlibrary/PictureQuest...

Chapter 3 Measuring Diet ©David C. Nieman Chapter 3 Outline 1. Reasons for Measuring Diet 2. Techniques in Measuring Diet 3. Considerations for Certain Groups 4. Issues in Dietary Measurement ©liquidlibrary/PictureQuest 5. Estimating Portion Size TOPIC 1 Reasons for Measuring Diet 3 Reasons for Measuring Diet 1. Assessing and monitoring food and nutrient intake ► Adequacy of diet intake, malnutrition ► Food supply ► Trends in food/nutrient intake ► Food additives & contaminants 2. Formulating and evaluating government health and agricultural policy ► Plan food production ► Target food assistance programs ► Food guides, legislation ©David C. Nieman ► Food & nutrition regulations (e.g. labeling, fortification) Nutrition education programs & extent of success ► Improve 3. Conducting epidemiologic research ► Explore diet-disease relationships human ► Identify populations with diet-disease risk health 4. Commercial purposes: food manufacturers TOPIC 2 Techniques for Measuring Diet 5 Techniques in Measuring Diet ► The “BIG THREE” ► 24-hour recall ► Food record (or food diary) ► Food frequency questionnaires ► Less common ► Diet history ► Duplicate food collections ► Food accounts ► Food balance sheets ► Other considerations ► Telephone interviews ► Technological innovations Techniques in Measuring Diet, Considerations ► Daily ► Food record ► 24-hour recall ► Usual or average ► Diet history ► Food frequency questionnaire ► Meal-based versus list-based 24-Hour Recall, 1 ► Trained interviewer asks respondent to recall everything eaten & drank and records ► Sometimes longer periods ► Interviewer helps with: ► Portion size estimates ► Prompts about previous day’s activities to assist memory ► Checking for omissions or mistakes afterwards 24-Hour Recall, 2 ► Technique 1 ► What consumed when woke up today until now ► Goes back to 24 hours ago up until respondent woke this morning ► Technique 2 ► Midnigh to midnight the previous day ► DEMONSTRATION 24-Hour Recall, 3 Strengths Limitations ► Inexpensive ► May withhold information ► Quick (