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Validation Information: FFQ (Latin American Adults)

Elorriaga 2013

Validation of a self-administered FFQ in adults in Argentina, Chile and Uruguay

Objective: To assess the reproducibility and validity among adults in the Southern

Cone of Latin America (Argentina, Chile and Uruguay) of a self-administered FFQ to be used in the CESCAS I Study, an ongoing observational prospective cohort study to detect and follow up CVD and their risk factors, as well as in other epidemiological studies.

Design: Relative validity of the FFQ was evaluated by comparing nutrient and selected food group intakes with those from three 24 h recalls (24HR) administered over 6 months. The FFQ was administered at baseline (FFQ1) and again after 3 months (FFQ2).

Setting: Primary-care centres in Argentina, Chile and Uruguay.

Subjects: Adults (n 147) aged 21–74 years.

Results: Reproducibility (FFQ1 v. FFQ2): the intra-class correlation coefficients for nutrients ranged from 0.52 (potassium) to 0.74 (fat). Validity (FFQ1 v. the average of three 24HR): the Pearson correlations for energy-adjusted nutrients ranged from 0.39 (thiamin and cholesterol) to 0.59 (carbohydrate). Joint classification: overall, 66% of participants in the lowest 24HR quintile were in the lowest one or two FFQ1 quintiles, and 62% of those in the highest 24HR quintile were in the highest one or two FFQ1 quintiles. On average, only 4% were misclassified into extreme quintiles.

Conclusions: The FFQ version for the Southern Cone seems to present moderate to acceptable relative validity and reliability for its use in the CESCAS I Study to measure dietary exposure.

Web Link

Validation Information

Year of Publication

Tool Information

Dietary Exposure Measured
Full Nutrient, Food Groups
Tool Type
Food Frequency Questionnaire
Timeframe Tool Measures info
12 months
Portion Size Measures info
Portion sizes were expressed in units and household measures and quantified by providing a choice of three sizes.
Reporting Method info
Format info
Supplements Measured
Not reported
Administration Method info

Study Information

Study Location
Latin America
Associated Nutrient Database
LATINFOODS database with the US Department of Agricultures National Nutrient Database used for partiular nutrients / foods not available on LATINFOODS
Comparator Validated Against
24hr Recall


Sample Size
147 (n-49 Argentina, n-51 Chile, n-47 Uruguay)
Adults, Elderly
Age of Population

Mean (SD): 45.4 (14.6) years

Other Notable Characteristics
Participants were recruited via opportunistic sampling from primary-care centres in three Latin American countries (Chile, Uruguay and Argentina)

Total number of nutrients validated: 20 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: 8
  • 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, Elderly Both Energy (kcal) -199 0.43 (P) 5
Protein (g) 5.5 0.36 (P) 5
Total fat (g) 2.3 0.39 (P) 5
SFA (g) -1 0.41 (P) 5
MUFA (g) -1.1 0.38 (P) 5
PUFA (g) -1.6 0.30 (P) 5
Carbohydrate (g) 15.3 0.44 (P) 5
Fibre (g) 2 0.42 (P) 5
Sodium (mg) 278.2 0.33 (P) 5
Calcium (mg) 60 0.37 (P) 5
Iron (mg) 2 0.34 (P) 5
Zinc (mg) 0.9 0.44 (P) 5
Retinol (µg) 256.5 0.32 (P) 5
Vitamin B12 (µg) 1.4 0.38 (P) 5
Vitamin C (mg) 26.3 0.36 (P) 5
Fruits (g) 35 0.52 (P) 5
Vegetables (g) 36.8 0.32 (P) 5

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.

Elorriaga N, Irazola VE, Defagó MD, Britz M, Martínez-Oakley SP, Witriw AM, Rubinstein AL. Validation of a self-administered FFQ in adults in Argentina, Chile and Uruguay. Public health nutrition. 2015 Jan;18(1):59-67.