Adherence to Mediterranean diet in Italy (ARIANNA) cross-sectional survey: study protocol

Introduction There is evidence, although limited, that the Italian population has been no longer following a Mediterranean dietary pattern. The ARIANNA (Adherence to the Mediterranean Diet in Italy) project consists of a survey-based cross-sectional study with the objective of gaining a greater knowledge of adherence to the Mediterranean Diet and its main determinants in different age groups of the Italian population. Methods/analysis The ARIANNA study will involve males and females aged ≥7 years, born and resident in Italy, and proficient in Italian. The voluntary enrolment will be in the period between March 2023 and May 2023. The data, which will include sociodemographic factors and dietary habits, will be collected through a web-based questionnaire. Adherence to the Mediterranean Diet will be assessed through the use of two validated score systems: the Mediterranean Diet Quality Index in children and adolescents for participants aged ≤16 years and the Mediterranean Diet Serving Score for participants aged ≥17 years. A review of the scientific literature will be carried out to collect historical data on adherence to the Mediterranean dietary pattern in the Italian population, which will be compared with those collected within this project. Ethics and dissemination The ARIANNA study has been approved by the Ethics Committee of Istituto Superiore di Sanità. The results will be disseminated through peer-reviewed papers, leaflets and documents for the general public. A report will be presented to the national policy makers, to give them the tools to implement appropriate intervention to improve, in necessary, the adherence to Mediterranean dietary pattern in Italy.