Validity of the Food Frequency Questionnaire-Estimated Intakes of Sodium, Potassium, and Sodium-to-Potassium Ratio for Screening at a Point of Absolute Intake among Middle-Aged and Older Japanese Adults

Using Food Frequency Questionnaires (FFQs) to compare dietary references for screening has been in high demand. However, FFQs have been widely used for ranking individuals in a population based on their dietary intake. We determined the validity of sodium (salt equivalent) intake, potassium intake,...

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Published in:Nutrients 2022-06, Vol.14 (13), p.2594
Main Authors: Matsuno, Tomoka, Takachi, Ribeka, Ishihara, Junko, Ishii, Yuri, Kito, Kumiko, Maruya, Sachiko, Nakamura, Kazutoshi, Tanaka, Junta, Yamagishi, Kazumasa, Yamaji, Taiki, Iso, Hiroyasu, Iwasaki, Motoki, Tsugane, Shoichiro, Sawada, Norie
Format: Article
Language:English
Subjects:
Adult
Aged
Blood pressure
Correlation coefficient
Correlation coefficients
Diet
Diet Records
Dietary intake
Excretion
Food
Humans
Hypertension
Ions
Japan
Medical laboratories
Middle age
Middle Aged
Nutrition research
Potassium
Potassium - urine
Public health
Questionnaires
Reproducibility of Results
Salts
Sodium
Sodium - urine
Sodium Chloride, Dietary
Surveys and Questionnaires
Urine
Validity
Womens health
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Summary:Using Food Frequency Questionnaires (FFQs) to compare dietary references for screening has been in high demand. However, FFQs have been widely used for ranking individuals in a population based on their dietary intake. We determined the validity of sodium (salt equivalent) intake, potassium intake, and sodium-to-potassium (Na/K) ratio obtained using the FFQ for identifying individuals who deviated from the dietary reference intakes (DRIs) measured using multiple 24-h urinary excretion measurements or 12-day weighed food records (WFR). This study included 235 middle-aged subjects. The correlation coefficients (CCs) between the FFQ and WFR estimates were mostly moderate (0.24−0.54); the CCs between the FFQ and 24-h urinary excretion measurements were low or moderate (0.26−0.38). Values of area under the receiver-operating curve (AUC) at the point of DRIs for salt equivalent or potassium were >0.7 with the WFR as the reference standard and 0.60−0.76 with the 24-h urinary excretion as the reference standard. Using both standard measures, the AUC for the Na/K ratio was
ISSN:2072-6643
2072-6643
DOI:10.3390/nu14132594