[Validation of a short questionnaire on frequency of dietary intake: reproducibility and validity].
BACKGROUND
Knowledge on dietary intake in individuals is an essential tool to know the dietary patterns and explore their association with the disease risk. One of the current methods most currently used are dietary intake questionnaires. The main drawback of their use is the need for previous validation. Our objective was to validate a short questionnaire on the frequency of dietary intake.


METHODS
Reus (Catalonia), Spain.


METHODS
71 adolescents and adults from both genders, with different socio-cultural levels and professional categories.


METHODS
The questionnaire was administered two times within an approximated period of one year to assess the reproducibility. Through this time, 9 24-hour recalls (gold standard method) were administered to determine the validity.


RESULTS
Spearman's correlation coefficients for the reproducibility analysis varied 0.49-0.75 for foods and 0.44-0.78 for energy and nutrients. Most of intra-class correlation coefficients varied 0.53-0.96 for foods and 0.49-0.78 for energy and nutrients. In the validity analysis, the correlations varied 0.27-0.59 for foods, and 0.30-0.49 for energy and nutrients. The correlation coefficients in the validity study varied 0.41-0.67 for foods, and 0.29-0.47 for energy and nutrients.


CONCLUSIONS
The questionnaire allows assessing the consumption of groups of foods, energy and macronutrients with adequate reproducibility and validity.
Facultad de Medicina y Ciencias de la Salud, Medicina Preventiva y Salud Pública, Universidad Rovira i Virgili, Reus, España.
I Trinidad
IT
Rodríguez
J Fernández
JF
Ballart
G Cucó
GC
Pastor
E Biarnés
EB
Jordà
V Arija
VA
Val
D000293:Adolescent; D000328:Adult; D000368:Aged; D004435:Eating; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires