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Validation Information: Food Consumption Frequency Questionnaire

Trinidad Rodriguez 2008

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. Setting: Reus (Catalonia), Spain. Subjects: 71 adolescents and adults from both genders, with different socio-cultural levels and professional categories. Interventions: 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. Conclusion: The questionnaire allows assessing the consumption of groups of foods, energy and macronutrients with adequate reproducibility and validity.

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Validation Information

Trinidad Rodriguez
Year of Publication

Tool Information

Dietary Exposure Measured
Full Nutrient, Food Groups
Tool Type
Food Frequency Questionnaire
Timeframe Tool Measures info
Portion Size Measures info
Portion weight (size) was estimated using data from a previous study.
Reporting Method info
Usual; Retrospective
Format info
Supplements Measured
Not reported
Administration Method info

Study Information

Study Location
Reus, Spain
Associated Nutrient Database
An adapted version of the French food composition table REGAL
Comparator Validated Against
24hr Recall


Sample Size
Adults, Adolescents
Age of Population

Range: 13-16 years (Adolescents); 25-65 years (Adults)

Other Notable Characteristics

Total number of nutrients validated: 18 info

Not all of the nutrients validated in the validation studies are included in the table below, as statistical data was only selected to be displayed for a number of nutrients, this included:

  • Energy
  • Fat
  • Saturated Fat
  • Mono-unsaturated Fat
  • Poly-unsaturated Fat
  • Carbohydrates
  • Protein
  • Sugar
  • Non‐starch polysaccharides(NSP)
  • Sodium
  • Calcium
  • Iron
  • Zinc
  • Retinol
  • Folate
  • Folic Acid
  • Vitamin B12
  • Vitamin C
  • Fruit & Vegetables
  • Urinary Nitrogen

To find information on the other validated nutrients please read the validation study.

  • Energy
  • Macronutrients: 5
  • Micronutrients: 12
Comparator Lifestage Sex Nutrient Measured info Mean Difference Standard Deviation info Correlation Coefficient info Cohen's Kappa Coefficient Percentage Agreement Percentage Agreement Categories info Lower Limits of Agreement Upper Limits of Agreement
24hr Recall Adults, Adolescents Both Energy (kcal) 0.49 (S)
Protein (g) 0.42 (S); 0.56(ICC)
Fat (g) 0.36 (S); 0.09 (ICC)
Carbohydrates (g) 0.53 (S); 0.42 (ICC)
Calcium (mg) 0.28 (S); 0.44 (ICC)
Iron (mg) 0.43(S); -0.01 (ICC)
Retinol (µg) 0.16 (S); -0.01 (ICC)
Folate (µg) 0.30 (S); 0.52 (ICC)
Vitamin B12 (µg) 0.31 (S); 0.08 (ICC)
Vitamin C (mg) 0.48 (S); 0.55 (ICC)
Fruit (g) 0.59 (S); 0.61 (ICC)
Vegetables (g) 0.52 (S); 0.75 (ICC)

Some results have been calculated using statistical techniques based on the published data.

For further information on statistical terms click on Statistical tests used in validation studies

All correlations coefficients in the table are unadjusted unless stated otherwise. For adjusted correlation coefficients and other statistical methods used in the study e.g. paired t-tests, please read the validation articles.

  • # Adjusted
  • † Energy adjusted.
  • ‡ For loge-transformed, energy-adjusted nutrient intakes.
  • ^ Adjacent included.
  • ᵟ Participants provided identical responses.
  • (w) = Weighted.

Trinidad Rodríguez I, Fernández Ballart J, Cucó Pastor G, Biarnés Jordà E, Arija Val V. Validación de un cuestionario de frecuencia de consumo alimentario corto: reproducibilidad y validez. Nutrición Hospitalaria. 2008;23(3):242-52.