**2. Materials and Methods**

#### *2.1. Data*

The food consumption data used in this study come from the national consumption survey carried out by the National Institute of Statistics [30]. This survey follows an approach based on the direct measurements of consumed food quantities. At the household level, measurements are made by participatory observation. Direct measurements are carried out through weighing surveys during seven full days that are not successive. A systematic weighing of food is performed for the entire selected sample. The data relating to the number of people for whom these foods are intended are also recorded [31].

This type of measure is repeated several times a year to take into account seasonal variations in consumption. This method provides a set of detailed quantitative data on the structure of food consumption of different socio-economic, cultural, and geographical groups. It is possible to determine the relationships between household characteristics and food consumption. By assessing energy and nutrient intakes, it is also possible to use this type of data to identify nutritional problems in a given population [35].

The term household is less restrictive than family unit, since it designates all the occupants of the same house (one person or more) without these people necessarily being relatives. The household represents a relatively stable and homogeneous structure, which makes it relevant for decision makers [36,37].
