Correlates of adherence to a posteriori derived dietary patterns of an Italian sample of adults

There is emerging evidence that the Italian population is switching away from the traditional Mediterranean dietary pattern towards unhealthy eating habits. We derived adults’ dietary patterns (DP) using a principal component analysis (PCA) on food groups intake of a representative sample of the Italian population (INRAN-SCAI 2005-2006), and correlated diet adherence scores with sociodemographic characteristics through multivariable linear regressions. After PCA, “High-fat”, “Western”, “Health-conscious”, “Italian, traditional” and “Junk, out of meal” DPs were retained. Female gender (β = 0.5103; p < 0.001) showed an association with higher adherence scores on the Health conscious pattern. Conversely, being female was associated with lower Z-scores on the High fat (β=-0.1849; p = 0.024), Western (β= -0.0711;p= 0.004) and Italian traditional (β=-0.4799;p<0.001) patterns. Age (β per one year increase=-0.0077;p<0.001) was associated with lower adherence scores in the Western and in the Junk, out of meal (β=-0.0078;p<0.001) pattern. Having either a secondary (β=-0.1301;p=0.016) or tertiary (β=-0.2156;p= 0.001) education level were independently associated with lower dietary Z- scores in the Italian traditional” pattern. Finally, there was wide regional variation, coming from different regions predicted adherence to different DPs. A substantial share of our sample showed unhealthy eating habits, which is consistent with the latest Italian dietary trends. KEY MESSAGES: • Future policies to improve diet quality at the national level should promote food literacy interventions targeting the differences between women and man among different age groups. • This work will provide the basis to investigate the environmental impact of higher pattern adherence scores.