title: Dietary intake in human immunodeficiency virus-infected adults: a comparison of dietary assessment methods.
abstract: OBJECTIVE
  The objective of this study was to compare estimated nutrient intakes from 3-day food records vs Food Frequency Questionnaire (FFQ) in a large cohort of individuals living with human immunodeficiency virus (HIV) infection.
  
  
  METHODS
  Dietary data from 315 HIV-positive participants enrolled in a longitudinal cohort study were collected. Nutrient intake data estimated from the Block FFQ were compared with multiple 3-day food records done over the same time period.
  
  
  METHODS
  Participants enrolled in Nutrition for Healthy Living, an ongoing cohort study based in Boston, MA, were studied.
  
  
  METHODS
  Using 3-day food records as the gold standard, we compared estimated nutrient intakes between the two assessment methods by (a) median of individual differences in intake, (b) correlation coefficients, (c) quintile ranking, and (d) intakes less than the Dietary Reference Intakes. Nutrient intake estimates between the two methods were compared using Spearman, Pearson, and deattenuated correlation coefficients.
  
  
  RESULTS
  Median reported intakes of all macronutrients and most micronutrients were significantly less on the FFQ for both men and women. Deattenuated correlations were less than 0.5 for 86% of the men and for 68% of the women. Mean percent agreement for quintile ranking was 30%.
  
  
  CONCLUSIONS
  In this large cohort of HIV-infected adults, we found significant differences between FFQs and food records in estimates of absolute dietary intakes, correlation coefficients, quintile rankings, and proportions of subjects consuming less than the Dietary Reference Intakes. These findings have implications for the interpretation and application of dietary intake data from FFQs in specialized populations.
authors.affiliation: Department of Family Medicine and Community Health, Tufts University, Boston, MA 02111, USA. kristy.hendricks@tufts.edu
authors.forename: Kristy
authors.initials: K
authors.lastname: Hendricks
authors.forename: Alice
authors.initials: A
authors.lastname: Tang
authors.forename: Donna
authors.initials: D
authors.lastname: Spiegelman
authors.forename: Sally
authors.initials: S
authors.lastname: Skinner
authors.forename: Margo
authors.initials: M
authors.lastname: Woods
mesh_terms: D000328:Adult; D015331:Cohort Studies; D004032:Diet / Q000592:standards*; D015930:Diet Records; D004034:Diet Surveys; D004040:Dietary Carbohydrates / Q000008:administration & dosage; D004041:Dietary Fats / Q000008:administration & dosage; D004044:Dietary Proteins / Q000008:administration & dosage; D004435:Eating; D002149:Energy Intake; D005006:Ethnicity; D005260:Female; D015658:HIV Infections / Q000503:physiopathology*; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D018977:Micronutrients / Q000008:administration & dosage; D015596:Nutrition Assessment; D018673:Nutrition Policy; D012044:Regression Analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires / Q000592:standards
chemical_list: D004040:Dietary Carbohydrates; D004041:Dietary Fats; D004044:Dietary Proteins; D018977:Micronutrients