Calibration of the dietary questionnaire for a multiethnic cohort in Hawaii and Los Angeles

Am J Epidemiol. 2000 Feb 15;151(4):358-70. doi: 10.1093/oxfordjournals.aje.a010214.

Abstract

The performance of the dietary questionnaire used in a multiethnic cohort study in Hawaii and Los Angeles was assessed in a calibration substudy that compared diet reported from the questionnaire with three 24-hour dietary recalls. For the calibration substudy, subjects from each of eight subgroups defined by sex and ethnic group (African-American, Japanese-American, Latino, and White) were chosen randomly from among the cohort members, and each participant's previous day's diet was assessed by telephone recall on three occasions over approximately 2 months. After completing the three 24-hour recalls, each calibration subject was sent a second questionnaire; 1,606 persons completed three recalls and a second questionnaire (127 to 267 per ethnic-sex group). This report describes correlation coefficients and calibration slopes for the relation between the 24-hour recalls and second questionnaire values for a selected set of macro- and micronutrients, as absolute intakes, nutrient densities, and calorie-adjusted nutrients. In all subgroups, estimates of the correlation between the questionnaire and 24-hour recalls were greater after energy adjustment (average correlations ranged from 0.57-0.74 for nutrient densities and from 0.55-0.74 for calorie-adjusted nutrients) than when absolute nutrient values were used (average range 0.26-0.57). For absolute nutrient intakes, the correlations were greatest for Whites, somewhat lower for Japanese-Americans and Latinos, and lowest for African-Americans. After energy adjustment, the difference between subgroups were diminished, and the correlations were generally highly satisfactory.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • African Americans / statistics & numerical data
  • Aged
  • Asian Americans / statistics & numerical data
  • Calibration
  • Cohort Studies
  • Diet Surveys*
  • Diet*
  • Epidemiologic Methods
  • Ethnic Groups / statistics & numerical data*
  • European Continental Ancestry Group / statistics & numerical data
  • Female
  • Hawaii / epidemiology
  • Hispanic Americans / statistics & numerical data
  • Humans
  • Los Angeles / epidemiology
  • Male
  • Middle Aged
  • Neoplasms / ethnology*
  • Surveys and Questionnaires / standards*