[Delphi method to reach consensus on education methods to promote healthy eating behaviors in adolescents]

Background: adolescence is a relevant period to educate in healthy eating behaviors. For this purpose it is necessary to obtain expert opinions and reach consensus and prioritize the best methodologies available to educate adolescents on healthy eating. Methods: the Delphi method was chosen to get consensus through repeated iterations of anonymous opinions in two rounds. Participants were experts in nutrition (24), education (14), and cooking (2), selected with the following inclusion criteria: outstanding professional career; interest shown in their knowledge area, and expertise in healthy eating education. The 40 experts in the first round were reduced to 37 in the second round. The questionnaire was mailed in the first round and the results were sent to establish priorities in the second round. The analysis was done with descriptive statistics (%). Consensus was reached if ≥ 75th percentile. Cronbach's alpha coefficient was used to analyze internal consistency, which was considered good for an alpha value higher than 0.7, and moderate for values between 0.6 and 0.7. Results: there was 90% consensus for food habits, culinary skills, and methodologies. In food habits experts prioritized improving access to healthy food and curricular changes at school. In culinary skills they agreed on healthy breakfast and healthy snack preparations; in methodologies the consensus was to educate in healthy eating at breakfast and lunch at school, and on participative activities such as cooking workshops. Conclusions: the Delphi method was useful to obtain consensus and priorities on the methodologies to educate adolescents in healthy eating.