Table 1.

Inclusion/exclusion criteria based on PICO.

Parameter	Inclusion Criteria	Exclusion Criteria
Population	School-age children and adolescents of any gender and ethnicity from 6 to 19 years of age	We excluded children populations <6 years and >19 years
Intervention	Adherence to the Mediterranean Diet	Studies focused on different types of diet
Comparator	Any other type of diet
Outcome	Physical and mental health outcomes, cognitive functioning, academic achievement, and quality of life	Other outcomes
Study design	Systematic review with or without meta-analysis written in English	Narrative reviews and scoping reviews were excluded