• Erna Davidović Cvetko, Ines Drenjančević, Ivana Jukić, Ana Stupin, Petar Šušnjara, Martina Vulin, Martina Kos, Matea Lukić, and Lorena Stanojević.
• Erna Davidović Cvetko, University of Applied Sciences Lavoslav Ružička in Vukovar, Županijska 50, 32000 Vukovar, Croatia, erna.davidovic@gmail.com.
• Croat. Med. J. 2024 Feb 29; 65 (1): 202920-29.

AimTo translate and adapt the European Prospective Investigation of Cancer (EPIC)-Norfolk food frequency questionnaire (FFQ) for use in Croatia, and to assess the reliability and reproducibility of the Croatian version of the EPIC-Norfolk FFQ.MethodsTranslation and cross-cultural adaptation were performed according to published recommendations. Reliability was assessed in 140 respondents (61 men; age range 8-40 years) divided into three groups: young adults, pregnant women, and children and adolescents. Reproducibility was assessed in the group of young adults (32/61 men), who completed the questionnaire on two occasions three months apart.ResultsThe EPIC-Norfolk FFQ showed good reliability (Cronbach alpha=0.874). Most nutrient intakes showed good reproducibility (intraclass correlation coefficient [ICC] between 0.7 and 0.9). Poor reproducibility was observed for alcohol (ICC=0.337), and moderate reproducibility was observed for beta-carotene (ICC=0.692) and total carbohydrates (ICC=0.698). Nutrient intakes measured by FFQ on two occasions did not significantly differ.ConclusionThe Croatian version of the EPIC-Norfolk FFQ can be a useful tool for assessing dietary intakes in young people in Croatia and possibly in neighboring countries with similar languages and dietary habits.

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