BackgroundFood group consumption data is useful for measuring and monitoring diet quality. To collect valid data across contexts, consistent and rigorous adaptation of survey questions is needed. ObjectivesThe objective of this research is to adapt food group consumption survey questions for 140 countries, by identifying the most common (sentinel) food items in each food group using a structured, participatory process and global standards for classification. MethodsSurvey questions were adapted for 29 food groups of the Diet Quality Questionnaire (DQQ) and for additional questions for infant and young child feeding (IYCF) indicators. For each country, adaptation comprised: (1) review of existing questionnaires, dietary intake data, and other information to draft food lists; (2) key informant (KI) interviews with 5-12 experts to identify and prioritize sentinel items including terminology; (3) comparison of items across countries within the same region to identify discrepancies, and follow-up with KIs to resolve them. Results1,016 KIs contributed to the adapted DQQs for 140 countries and IYCF DQQs for 96 countries, amounting to approximately 9,550 hours of collective effort (68 person-hours/country on average) from 2020-2024. The process revealed numerous challenges and decisions to ensure consistent classification of items and valid question formulation. ConclusionCountry-specific questions adhering to global standards, and adapted through cumulative and iterative input of local experts, enable the collection of food group consumption data that is valid and comparable across time and geographies. The adapted survey questions have been implemented in the Demographic and Health Surveys (DHS) and Gallup World Poll in 94 countries, generating the first cross-country data on minimum dietary diversity (MDD) and other diet quality indicators. The finalized country-adapted DQQs and IYCF DQQs were translated to 143 national languages and are published online as a global public good for population-level diet quality measurement.
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