ArticlePublic health nutrition2015
Reproducibility and validity of an FFQ developed for the Korea National Health and Nutrition Examination Survey (KNHANES).
Article in Public health nutrition, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07175701 (Effects of Ultra-processed Food Reduction Intervention on Postprandial Glucose and Glycemic Variability in Korean Young Adults), which is not on this map. Cited by 71 papers, 2 of them syntheses that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Effects of Ultra-processed Food Reduction Intervention on Postprandial Glucose and Glycemic Variability in Korean Young Adults: Study Protocol for the ULTRA-CGM Randomized Controlled Trial
Who cites it
71 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Dietary β-Carotene, Vitamin A, and Retinol Intake and Prevalence of Colorectal Adenoma: A Cross-Sectional Study and Meta-Analysis.Gut and liver · 2025Pooled it
- A meta-analysis of the reproducibility of food frequency questionnaires in nutritional epidemiological studies.The international journal of behavioral nutrition and physical activity · 2021Pooled it
- Olfactory Dysfunction Is Associated with the Intake of Macronutrients in Korean Adults.PloS one · 2016Trial
- Article
- Associations of Dietary Patterns, Daily Nutrient Intakes, and Food-Group Intakes with Hyperglycemia in Patients Undergoing Chemotherapy.Nutrients · 2026Article
- Gender-specific associations of diet quality and dietary patterns with metabolic syndrome: evidence from Korea National Health and Nutrition Examination Survey (KNHANES) VI.Nutrition & metabolism · 2026Article
- Association between plant-based diet indices and depressive symptoms among South Korean adults: a cross-sectional study using the 2014 and 2016 Korea National Health and Nutrition Examination Surveys.Clinical nutrition research · 2026Article
- Comparison of chatbot and paper-based FFQs in participants who underwent colorectal or gastric cancer screening.Nutrition research and practice · 2025Article
- Article
- The association between noodle consumption and metabolic syndrome in Korean adults.Asia Pacific journal of clinical nutrition · 2025Article
- Empowering Healthy Adolescents: A Dietary Adherence Tool Incorporating Environmental Factors Based on Korean Guidelines.Nutrients · 2025Article
- Comparison of nutrients and ultra-processed food consumption between different phenotypes defined by abdominal obesity and sarcopenia.Frontiers in nutrition · 2025Article
- Sugar-sweetened beverage consumption and metabolic dysfunction-associated steatotic liver disease: a beverage type-specific analysis using Korea National Health and Nutrition Examination Survey.Epidemiology and health · 2025Article
- Development and Validation of a Questionnaire to Measure Adherence to a Mediterranean-Type Diet in Youth.Nutrients · 2024Article
- Associations among the Duodenal Ecosystem, Gut Microbiota, and Nutrient Intake in Functional Dyspepsia.Gut and liver · 2024Article
- Specific Foods Associated with Depressive Symptoms among Young Adults and Their Bioactive Effects.Nutrients · 2024Article
- Article
- The effect of prebiotic and probiotic food consumption on anxiety severity: a nationwide study in Korea.Frontiers in nutrition · 2024Article
- Development of a Semi-Quantitative Food-Frequency Questionnaire for Korean Adults with Obesity.Nutrients · 2023Article
- Coffee intake and hypertension in Korean adults: results from KNHANES 2012-2016.Clinical hypertension · 2023Article
11 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveWe aimed to evaluate the reproducibility and validity of the newly developed FFQ for the Korean National Health and Nutrition Examination Survey (KNHANES) and to estimate the measure's calibration factors.
designThe 109-item FFQ was administered twice, approximately 9 months apart. We also collected four seasonal 3 d dietary records (DR) as a reference method. Correlation coefficients and joint classification were computed to compare intakes of energy, thirteen nutrients and eleven food groups between the two FFQ to evaluate reproducibility. For validity, de-attenuated and energy-adjusted correlation, joint classification and Bland-Altman statistics were calculated for energy and nutrients between the first FFQ and the DR. To calibrate the FFQ, we performed a linear regression analysis in which the DR were the dependent variables and FFQ, age and sex were the independent variables.
settingSeoul metropolitan area, Republic of Korea. SUBJECTS: A total of 126 adults aged 20-65 years.
resultsThe average correlation coefficients measuring reproducibility were 0·54 for nutrients and 0·57 for food groups. The mean correlation coefficient measuring validity was 0·40 for all nutrients between the first FFQ and the DR. On average, 75 % of the participants were classified into the same or adjacent quartiles, while 5 % of the participants were grossly misclassified. The mean energy and nutrient intakes estimated by the calibrated FFQ were similar to the means estimated by the DR.
conclusionsThe newly developed FFQ for assessing dietary intake in the KNHANES has acceptable reproducibility and modest validity compared with a 12 d DR collected over a 9-month period.
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