How is Dietary Data Collected in Epidemiological Studies?
Collecting accurate dietary data is challenging but crucial. Common methods include:
Food Frequency Questionnaires (FFQs): These surveys ask participants how often they consume specific foods. 24-Hour Recalls: Participants report all the foods and beverages they consumed in the past 24 hours. Diet Diaries: Individuals record their food intake over a specific period, usually a week. Biomarkers: Biological samples such as blood or urine can provide objective data on nutrient intake.
