SAC	School-Aged Children
ID	Iron Deficiency
OR	Odds Ratio
CI	Confidence Interval
YLD	Years Lived with Disability
IDA	Iron Deficiency Anemia
PSC	Pre-School Children
CDC	Centers for Disease Control and Prevention
WRA	women of reproductive age
Hb	Hemoglobin
CRP	C-reactive protein
AGP	α-1-acid glycoprotein
sTFR	soluble transferrin receptor
ENSANUT	Mexican National Health and Nutrition Survey 2006
NHANES	The National Health and Nutrition Examination Surveys
ENSIN	Encuesta Nacional de la Situaci ón Nutricional
WHO	World Health Organization
SES	socio-economic status
PCA	Principal component analysis
PIR	poverty income ratio
SE	standard error
IRB	institutional review board