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Methods of Measuring Dietary Diversity. Lalita Bhattacharjee Agnieszka Balcerzak Aklima Parvin Nutritionists Training on Comparative Review of the Nutrition Situation and Policies in Selected Countries and with particular reference to Bangladesh 27 March to 6 April 2014.
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Methods of Measuring Dietary Diversity Lalita Bhattacharjee Agnieszka Balcerzak Aklima Parvin Nutritionists Training on Comparative Review of the Nutrition Situation and Policies in Selected Countries and with particular reference to Bangladesh 27 March to 6 April 2014
Foods differ in terms of nutrients they deliver to our organism, and we need to consume a bit from each of the food groups to make sure we cover our nutritional needs.
Grouping foods in a functional food groups is the first step to talk about dietary diversity
Overview of the Methodology • Food security assessments have been standardized • For dietary assessment there is no one “correct” method Recent Fanta II/FAO have proposed and validated 8 options: • 6 group (restricted and unrestricted) • 9 groups (restricted and unrestricted) • 13 groups (restricted and unrestricted) • 21 groups (restricted and unrestricted)
Data Collection Dietary recall • Limitations: • Incorrect recall (respondent biases) • Investigator error • Time consuming interview • Relays largely on the cognitive abilities and memory of the respondent • Annoying for the respondent Practical Exercise 3: Use of dietary diversity in food security and nutrition surveillance – Jillian L. Waid
Scoring Practical Exercise 3: Use of dietary diversity in food security and nutrition surveillance – Jillian L. Waid
Methods for Data Analysis • Cut-offs: Not universally defined • FANTA 2: less than 5 (out of 9 or 13 groups) inadequate • Programmatically: • Goal to raise the mean overall to the mean of the top third of respondents
HDDS Calculation • Step 1: Assign 1 if the food group/item consumed; 0 not consumed. Sum all the scores for various food groups. Sum will be between 0-12. • Step 2: The average HDDS for the sample population Setting HDDS Threshold: Option 1: From a baseline survey take the HDDS for the richest income tercile (33%) Option 2: From a baseline survey take HDDS of the upper tercile of diet diversity (33%) Sum HDDS Total no. of households