Table 1.

Survey inclusion and exclusion criteria

Included	Excluded
Surveys conducted at an individual level	Surveys collected at group, i.e. household, level
Nationally representative surveys	Non-nationally representative, regional-only surveys
Results of surveys reported by published and unpublished reports, academic journals and websites	Surveys with data collected before 1990
Surveys that included individuals>2 years	Surveys with samples exclusively<2 years
Surveys based on whole diet rather than specific food groups	Surveys with incomplete food group coverage
	Surveys with small sample sizes (n<200)