Table 1.

Stratification of food insecurity according to the reviewed studies

Author (year)	Stratification
Holben, Pheley (2006) [16]	−*
Seligman et al (2007) [17]	FS – No affirmative answer
	Mild FI – 1 to 5 affirmative answers
	Severe FI – 6 to 10 affirmative answers
Jilcott et al (2011) [18]; Berkowitz et al (2013; 2017) [19,24]	FS – 0 to 2 affirmative answers
	FI – 3 or more affirmative answers
Pérez-Escamilla et al (2014) [25]	FS – 0
	Mild FI – 1 to 3 points
	Moderate FI – 4 to 6 points
	Severe FI – 7 to 8 points
Shariff et al (2014) [26]	FS – 0
	FI – 1 to 8 points
Irving, Njai, Siegel (2014) [20]	FS – Answer was rarely or never
	FI – Answer was always, usually or sometimes
Moreno et al (2015) [22]	FS – 0 to 1 affirmative answer
	FI – 2 affirmative answers
Shin et al (2015) [21]; Saiz Júnior et al (2016) [23]	An affirmative response to any of the FI assessment questions

FS – food security, FI – food insecurity

*Stratification method was not disclosed.