Validity of the Food Frequency Questionnaire Assessing the Folate Intake in Women of Reproductive Age Living in a Country without Food Fortification: Application of the Method of Triads

2017
Authors
Zeković, MilicaĐekić-Ivanković, Marija
Nikolić, Marina
Gurinović, Mirjana
Krajnović, Dušanka

Glibetić, Marija
Article (Published version)
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The study aimed to examine the external validity of the Folate Food Frequency Questionnaire (F-FFQ) designed for assessing the folate intake in Serbian women of reproductive age. The F-FFQ was tested against repeated 24 h dietary recalls and correspondent nutritional biomarkers (red blood cells (RBC) and serum folate concentrations) using the method of triads. In a cross sectional study, 503 women aged 18-49 years completed dietary questionnaires and representative validation subsample (n = 50) provided fasting blood samples for biomarker analyses. Correlation coefficients were calculated between each of the dietary methods and three pair-wise correlations were applied for the calculation of validity coefficients. Correlation coefficients observed between F-FFQ and three 24 h recalls were r = 0.56 (p lt 0.001) and r = 0.57 ( p lt 0.001) for total sample and validation group, respectively. Bland-Altman plot and cross-classification analyses indicated good agreement between methods. ...High validity coefficients were determined between the true intake (I) and dietary assessment methods, F-FFQ (Q) and 24 h dietary recalls (R) (rho QI(rbc) = 0.871 and rho QI(ser) = 0.814; rho RIrbc = 0.652 and rho RIser = 0.698), and moderate ones for biomarkers (B) (rho BIrbc = 0.428 and rho BIser = 0.421). The F-FFQ is valid instrument for the assessment of dietary folate intake in women living in Serbia, a country without mandatory folic acid food fortification.
Source:
Nutrients, 2017, 9, 2Publisher:
- MDPI, Basel
Funding / projects:
DOI: 10.3390/nu9020128
ISSN: 2072-6643
PubMed: 28208817
WoS: 000397023100041
Scopus: 2-s2.0-85012880765
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PharmacyTY - JOUR AU - Zeković, Milica AU - Đekić-Ivanković, Marija AU - Nikolić, Marina AU - Gurinović, Mirjana AU - Krajnović, Dušanka AU - Glibetić, Marija PY - 2017 UR - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2902 AB - The study aimed to examine the external validity of the Folate Food Frequency Questionnaire (F-FFQ) designed for assessing the folate intake in Serbian women of reproductive age. The F-FFQ was tested against repeated 24 h dietary recalls and correspondent nutritional biomarkers (red blood cells (RBC) and serum folate concentrations) using the method of triads. In a cross sectional study, 503 women aged 18-49 years completed dietary questionnaires and representative validation subsample (n = 50) provided fasting blood samples for biomarker analyses. Correlation coefficients were calculated between each of the dietary methods and three pair-wise correlations were applied for the calculation of validity coefficients. Correlation coefficients observed between F-FFQ and three 24 h recalls were r = 0.56 (p lt 0.001) and r = 0.57 ( p lt 0.001) for total sample and validation group, respectively. Bland-Altman plot and cross-classification analyses indicated good agreement between methods. High validity coefficients were determined between the true intake (I) and dietary assessment methods, F-FFQ (Q) and 24 h dietary recalls (R) (rho QI(rbc) = 0.871 and rho QI(ser) = 0.814; rho RIrbc = 0.652 and rho RIser = 0.698), and moderate ones for biomarkers (B) (rho BIrbc = 0.428 and rho BIser = 0.421). The F-FFQ is valid instrument for the assessment of dietary folate intake in women living in Serbia, a country without mandatory folic acid food fortification. PB - MDPI, Basel T2 - Nutrients T1 - Validity of the Food Frequency Questionnaire Assessing the Folate Intake in Women of Reproductive Age Living in a Country without Food Fortification: Application of the Method of Triads VL - 9 IS - 2 DO - 10.3390/nu9020128 ER -
@article{ author = "Zeković, Milica and Đekić-Ivanković, Marija and Nikolić, Marina and Gurinović, Mirjana and Krajnović, Dušanka and Glibetić, Marija", year = "2017", abstract = "The study aimed to examine the external validity of the Folate Food Frequency Questionnaire (F-FFQ) designed for assessing the folate intake in Serbian women of reproductive age. The F-FFQ was tested against repeated 24 h dietary recalls and correspondent nutritional biomarkers (red blood cells (RBC) and serum folate concentrations) using the method of triads. In a cross sectional study, 503 women aged 18-49 years completed dietary questionnaires and representative validation subsample (n = 50) provided fasting blood samples for biomarker analyses. Correlation coefficients were calculated between each of the dietary methods and three pair-wise correlations were applied for the calculation of validity coefficients. Correlation coefficients observed between F-FFQ and three 24 h recalls were r = 0.56 (p lt 0.001) and r = 0.57 ( p lt 0.001) for total sample and validation group, respectively. Bland-Altman plot and cross-classification analyses indicated good agreement between methods. High validity coefficients were determined between the true intake (I) and dietary assessment methods, F-FFQ (Q) and 24 h dietary recalls (R) (rho QI(rbc) = 0.871 and rho QI(ser) = 0.814; rho RIrbc = 0.652 and rho RIser = 0.698), and moderate ones for biomarkers (B) (rho BIrbc = 0.428 and rho BIser = 0.421). The F-FFQ is valid instrument for the assessment of dietary folate intake in women living in Serbia, a country without mandatory folic acid food fortification.", publisher = "MDPI, Basel", journal = "Nutrients", title = "Validity of the Food Frequency Questionnaire Assessing the Folate Intake in Women of Reproductive Age Living in a Country without Food Fortification: Application of the Method of Triads", volume = "9", number = "2", doi = "10.3390/nu9020128" }
Zeković, M., Đekić-Ivanković, M., Nikolić, M., Gurinović, M., Krajnović, D.,& Glibetić, M.. (2017). Validity of the Food Frequency Questionnaire Assessing the Folate Intake in Women of Reproductive Age Living in a Country without Food Fortification: Application of the Method of Triads. in Nutrients MDPI, Basel., 9(2). https://doi.org/10.3390/nu9020128
Zeković M, Đekić-Ivanković M, Nikolić M, Gurinović M, Krajnović D, Glibetić M. Validity of the Food Frequency Questionnaire Assessing the Folate Intake in Women of Reproductive Age Living in a Country without Food Fortification: Application of the Method of Triads. in Nutrients. 2017;9(2). doi:10.3390/nu9020128 .
Zeković, Milica, Đekić-Ivanković, Marija, Nikolić, Marina, Gurinović, Mirjana, Krajnović, Dušanka, Glibetić, Marija, "Validity of the Food Frequency Questionnaire Assessing the Folate Intake in Women of Reproductive Age Living in a Country without Food Fortification: Application of the Method of Triads" in Nutrients, 9, no. 2 (2017), https://doi.org/10.3390/nu9020128 . .