Open AccessREPRODUCIBILITY AND VALIDITY OF AN EXTENSIVE SEMIQUANTITATIVE FOOD FREQUENCY QUESTIONNAIRE AMONG GREEK SCHOOL TEACHERS
Author(s) -
Charalambos Gnardellis,
Antonia Trichopoulou,
Klea Katsouyanni,
Evangelos Polychronopoulos,
Eric B. Rimm,
Dimitrios Trichopoulos
Publication year - 1995
Publication title -
epidemiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.901
H-Index - 173
eISSN - 1531-5487
pISSN - 1044-3983
DOI - 10.1097/00001648-199501000-00015
Subject(s) - food frequency questionnaire , reproducibility , medicine , environmental health , gerontology , demography , statistics , mathematics , sociology
We evaluated the reproducibility and validity of a 190-item semiquantitative food frequency questionnaire (FFQ) to be used in a large prospective study in the Athens area of Greece. Eighty persons, 42 men and 38 women, ages 25-67 years, completed a self-administered FFQ, followed by monthly 24-hour diet recalls and then a second FFQ 1 year after the first. Correlation coefficients measuring the reproducibility and validity of the FFQ indicate that the questionnaire is reproducible and provides a reasonably reliable measure of intake for many nutrients over a period of 1 year.