Rachel M. Zack|Kahema Irema|Patrick Kazonda|Germana Leyna|Enju Liu|Susan Gilbert|Zohra Lukmanji|Donna Spiegelman|Wafaie Fawzi|Marina Njelekela|Japhet Killewo|Goodarz Danaei
Validity of an FFQ to measure nutrient and food intakes in Tanzania
Harvard University|Muhimbili University of Health and Allied Sciences|Muhimbili University of Health and Allied Sciences|Muhimbili University of Health and Allied Sciences|Harvard Global Health Institute|Harvard Global Health Institute|Tumaini University|Harvard University|Harvard Global Health Institute|Harvard University|Muhimbili University of Health and Allied Sciences|Muhimbili University of Health and Allied Sciences|Harvard Global Health Institute|Harvard University
objectiveffq often used estimate food nutrient intakes rank individuals level intake evaluated relative validity semiquantitative ffq created use tanzania comparing two 24 h diet recallsdesignwe measured relative validity ffq deattenuated energyadjusted rank correlations nutrients deattenuated rank correlations food groups performed crossclassification analysis energyadjusted nutrient quartiles using percentage agreement blandaltman analysissettinginterviews conducted 2014 participants homes ukonga dar es salaam tanzaniasubjectswe surveyed 317 adults aged 40 years older general publicresultsdeattenuated energyadjusted rank correlation coefficients nutrients ranged 003 riboflavin 041 percentage energy carbohydrates median correlation 021 coefficients food groups ranged 000 root vegetables 051 alcohol median 035 relative average two 24 h diet recalls ffq overestimated energy intake intakes nutrients food groups tea ratios among nutrients ranging 134 sfa 708 vitamin among food groups 092 tea 900 fruit percentage participants classified nutrient intake quartile ranged 23 sfa 32 niacin pantothenic acid median 28 conclusionsthe ffq performed moderately well urban tanzanian adults