Association of diet quality indices with serum and metabolic biomarkers in participants of the ORISCAV-LUX-2 study.

Food-group-based indices, including DASH-S, DQI-I, and AHEI, were good predictors for serum/metabolic parameters, while nutrient-based indices, such as the DAI or NNRS, were less related to biological markers and, thus, less suitable to reflect diet quality in a general population.