Fig. 3
From: Validation of a digital food frequency questionnaire for the Northern Sweden Diet Database
Relative validity of the Healthy Nordic Food Index (HNFI), relative Mediterranean Diet Index (rMED), and the Plant-based Diet Index (PDI). (A) Mean score and correlation between index scores assessed from 24HDR and FFQ2020 recordings. (B) Tertile cross-classifications for the three indices by test and reference estimations (C) Bland Altman plots for agreement between the two methods. The plots incorporate data from all 244 participants, and the 13 participants with extreme PAL values are highlighted in orange. *** for p < 0.001