Table 3.

Common definitions of diet diversity used

Study	Definition
Protection Against Allergy Study in Rural Environments (PASTURE) [86] Multicenter EU study	1. Diet diversity: the 15 foods commonly eaten by 80% of the children in the study in the first year of life, which also included all food allergens: any cow’s milk, yogurt, other milk products; eggs; nuts; vegetables or fruits; cereals; bread; meat; fish; soy; margarine or butter; cake; and chocolate 2. A second definition: included the 6 major foods introduced in the first 6 months or first 12 months of life, which did not include all food allergens: vegetables or fruits; cereals; bread; meat; cake; and yogurt
Finnish study [87]	The number of foods introduced at 3, 4, and 6 months of age
Food Allergy Research and Intolerance study (FAIR) [85] UK	1. Count of 21 common foods eaten in infancy: overall diet diversity 2. WHO definition of diet diversity (7 food groups: grains/roots/tubers, legumes/nuts, dairy, flesh foods, eggs, vitamin A-rich fruits and vegetables, other fruits and vegetables) 3. Number of fruits and vegetables consumed: fruit and vegetable diversity 4. Count of 8 common food allergens: milk, egg, wheat, fish, soy, peanut, tree nuts, sesame
China [88]	The number of food groups consumed (0–11 food groups)
Korea [89]	1. Food group diversity 2. Food allergen diversity 3. WHO definition of diet diversity

WHO, World Health Organization.