Reproducibility and validity of an FFQ developed for the Korea National Health and Nutrition Examination Survey (KNHANES)

Datos Bibliográficos

ID15090366
AutoresDong Woo Kim (0000-0003-1892-8985, Seoul National University), Sujin Song (0000-0002-1035-676X, Seoul National University), Jung Eun Lee (0000-0003-0917-2872, Sookmyung Women's University), Kyungwon Oh (0000-0001-8097-6078, Korea Disease Control and Prevention Agency), Jee-Seon Shim (0000-0002-8671-3153, Korea Disease Control and Prevention Agency), Jeeseon Shim, Sanghui Kweon (0000-0002-2678-8858, Korea Disease Control and Prevention Agency), Hee Young Paik (0000-0002-4026-0881, Seoul National University), Hyojee Joung (0000-0003-1182-7786, Seoul National University, autor de correspondencia)
Año2015
Volumen18
Número8
Páginas1369-1377
Fecha de publicación2015-06-01
Peer ReviewedSí
Open AccessSí
TipoARTICLE
RevistaPublic Health Nutrition (JOURNAL)
Identificadores de la revistaISSN: 1368-9800 • E-ISSN: 1475-2727
EditorialCambridge University Press (CUP) (PUBLISHER)
DOI10.1017/s1368980014001712
PMID25167205
OpenAlexW2026338341
IdiomaEN
Citas recibidas8
Referencias citadas41

Objective We 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. Design The 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. Setting Seoul metropolitan area, Republic of Korea. Subjects A total of 126 adults aged 20–65 years. Results The 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. Conclusions The 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

Environmental health · Food frequency questionnaire · National Health and Nutrition Examination Survey · Population · Quartile · Reproducibility · Statistics · Mathematics · Medicine · Nutrition, Health and Food Behavior · Nutritional Studies and Diet · Obesity, Physical Activity, Diet · Internal Medicine