Firoozeh Hosseini?Esfahani|Golaleh Asghari|Parvin Mirmiran|Fereidoun Azizi
Reproducibility and Relative Validity of Food Group Intake in a Food Frequency Questionnaire Developed for the Tehran Lipid and Glucose Study
Research Institute for Endocrine Sciences|Shahid Beheshti University of Medical Sciences|Research Institute for Endocrine Sciences|Shahid Beheshti University of Medical Sciences|Research Institute for Endocrine Sciences|Shahid Beheshti University of Medical Sciences|National Nutrition and Food Technology Research Institute|Research Institute for Endocrine Sciences|Shahid Beheshti University of Medical Sciences
examine validity reproducibility food groups semiquantitative food frequency questionnaire ffq developed tehran lipid glucose study tlgsto evaluate reproducibility food groups included ffq 132 subjects 61 men 71 women aged 20 years older twice completed 168item ffq ffq1 ffq2 14month interval ffq1 ffq2 1year interval 12 dietary recalls drs collected 1 month assess validity ffq seventeen food groups derived ffq based methods described previous studies ageadjusted deattenuated spearman correlation coefficients used assess validity ffqthe mean sd age body mass index subjects 355 168 years 255 52 kgm2 respectively validity correlation coefficients ranged 003 liquid oil 077 simple sugars men median 044 012 snacks 079 simple sugars women median 037 energyadjusted intraclass correlation coefficient reflects reproducibility ffq 051 men highest tea coffee 091 women 059 highest simple sugars 074 highest percentage complete agreement disagreement observed snacks desserts 606 potatoes dairy products 128 respectively men tea coffee 629 legumes 157 womenthe ffq designed tlgs found reliable valid assessing intake several food groups