====== Diet Scores ======

Lifelines participants filled in extensive [[FFQ|Food Frequency Questionnaires]] to assess their diet and nutrient intake. The FFQ results in a large quantity of detailed raw data, which require extensive specialized processing and calculations to yield scientifically valid sum scores ([[sections|section]]: [[secondary & linked variables]]).\\
There are multiple types of diet sum scores that can be derived from the FFQ. Lifelines offers two types:
  - The [[Lifelines Diet Score]] (LLDS), developed by the UMCG [[https://www.rug.nl/research/epidemiology/?lang=en|department of epidemiology]], is a fully food-based and evidence-based tool to assess relative diet quality. Its highest scores represent diets expected to be most beneficial in light of the prevention of nutrition-related chronic diseases;
  - The [[Dutch Healthy Diet index]] (DHD), developed by the WUR [[https://www.wur.nl/en/Research-Results/Chair-groups/Agrotechnology-and-Food-Sciences/Human-Nutrition-and-Health.htm|department of human nutrition and health]] is a tool to assess participant's own diet quality and adherence to the 2015 Dutch dietary guidelines. Higher scores on this index indicate a better adherence to the DHD2015 guidelines. 

====== Comparison of the LLDS and DHD ======