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Validation and reproducibility of food frequency questionnaire for Korean genome epidemiologic study.
Eur J Clin Nutr. 2007 Dec; 61(12):1435-41.EJ

Abstract

OBJECTIVE

To evaluate validity and reliability of the food-frequency questionnaire (FFQ) developed for the Korean Genome Epidemiologic Study (KoGES).

METHODS

FFQ was administered twice at 1-year interval (first FFQ (FFQ1) at the beginning and second FFQ (FFQ2) at the end of the study) and diet records (DRs) were collected for 3 days during each of the four seasons from December 2002 to May 2004 for those who attended the health examination center. At the end of the study period, we collected the 12-day DRs of 124 participants. The nutrient intakes from the DRs were compared with both FFQ1 and FFQ2.

RESULTS

The intakes of energy and some nutrients estimated from FFQ1 and FFQ2 were different from those assessed by the DRs. Especially, the consumption of carbohydrates was higher in FFQ1 and FFQ2 than in the DRs. The de-attenuated, age, sex and energy intake adjusted correlation coefficients between the FFQ2 and the 12-day DRs in Korean population ranged between 0.23 (Vitamin A) and 0.64 (carbohydrate). The median for all nutrients was 0.39. The correlations were similar when we compared nutrient densities of both methods. Joint classification of calorie-adjusted nutrient intakes assessed by FFQ2 and 12-day DRs by quartile ranged from 25.8% (vitamin A) to 39.5% (carbohydrate, iron) for exact concordance. Except vitamin A, the proportion of subjects classified into distant quartile was less than 7% in all nutrients. The median of correlations between the two FFQs 1 year apart were 0.45 for all nutrient intakes and 0.39 for nutrient densities.

CONCLUSIONS

We conclude that the FFQ we have developed appears to be an acceptable tool for assessing the nutrient intakes in this population. Further studies for calibration of the FFQ collected from multicenters participating in the KoGES are needed.

SPONSORSHIP

This study was supported by the budget of the National Genome Research Institute, Korea National Institute of Health (2002-347-6111-221).

Authors+Show Affiliations

Center for Genomic Science, National Institute of Health, Center for Disease Control and Prevention, Seoul, Korea.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Validation Study

Language

eng

PubMed ID

17299477

Citation

Ahn, Y, et al. "Validation and Reproducibility of Food Frequency Questionnaire for Korean Genome Epidemiologic Study." European Journal of Clinical Nutrition, vol. 61, no. 12, 2007, pp. 1435-41.
Ahn Y, Kwon E, Shim JE, et al. Validation and reproducibility of food frequency questionnaire for Korean genome epidemiologic study. Eur J Clin Nutr. 2007;61(12):1435-41.
Ahn, Y., Kwon, E., Shim, J. E., Park, M. K., Joo, Y., Kimm, K., Park, C., & Kim, D. H. (2007). Validation and reproducibility of food frequency questionnaire for Korean genome epidemiologic study. European Journal of Clinical Nutrition, 61(12), 1435-41.
Ahn Y, et al. Validation and Reproducibility of Food Frequency Questionnaire for Korean Genome Epidemiologic Study. Eur J Clin Nutr. 2007;61(12):1435-41. PubMed PMID: 17299477.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Validation and reproducibility of food frequency questionnaire for Korean genome epidemiologic study. AU - Ahn,Y, AU - Kwon,E, AU - Shim,J E, AU - Park,M K, AU - Joo,Y, AU - Kimm,K, AU - Park,C, AU - Kim,D H, Y1 - 2007/02/07/ PY - 2007/2/15/pubmed PY - 2008/2/20/medline PY - 2007/2/15/entrez SP - 1435 EP - 41 JF - European journal of clinical nutrition JO - Eur J Clin Nutr VL - 61 IS - 12 N2 - OBJECTIVE: To evaluate validity and reliability of the food-frequency questionnaire (FFQ) developed for the Korean Genome Epidemiologic Study (KoGES). METHODS: FFQ was administered twice at 1-year interval (first FFQ (FFQ1) at the beginning and second FFQ (FFQ2) at the end of the study) and diet records (DRs) were collected for 3 days during each of the four seasons from December 2002 to May 2004 for those who attended the health examination center. At the end of the study period, we collected the 12-day DRs of 124 participants. The nutrient intakes from the DRs were compared with both FFQ1 and FFQ2. RESULTS: The intakes of energy and some nutrients estimated from FFQ1 and FFQ2 were different from those assessed by the DRs. Especially, the consumption of carbohydrates was higher in FFQ1 and FFQ2 than in the DRs. The de-attenuated, age, sex and energy intake adjusted correlation coefficients between the FFQ2 and the 12-day DRs in Korean population ranged between 0.23 (Vitamin A) and 0.64 (carbohydrate). The median for all nutrients was 0.39. The correlations were similar when we compared nutrient densities of both methods. Joint classification of calorie-adjusted nutrient intakes assessed by FFQ2 and 12-day DRs by quartile ranged from 25.8% (vitamin A) to 39.5% (carbohydrate, iron) for exact concordance. Except vitamin A, the proportion of subjects classified into distant quartile was less than 7% in all nutrients. The median of correlations between the two FFQs 1 year apart were 0.45 for all nutrient intakes and 0.39 for nutrient densities. CONCLUSIONS: We conclude that the FFQ we have developed appears to be an acceptable tool for assessing the nutrient intakes in this population. Further studies for calibration of the FFQ collected from multicenters participating in the KoGES are needed. SPONSORSHIP: This study was supported by the budget of the National Genome Research Institute, Korea National Institute of Health (2002-347-6111-221). SN - 0954-3007 UR - https://www.unboundmedicine.com/medline/citation/17299477/Validation_and_reproducibility_of_food_frequency_questionnaire_for_Korean_genome_epidemiologic_study_ L2 - http://dx.doi.org/10.1038/sj.ejcn.1602657 DB - PRIME DP - Unbound Medicine ER -