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- Yuan, Xiaoyi; Murakami, Kentaro; Asakura, Keiko; Uechi, Ken; Masayasu, Shizuko; Sasaki, Satoshi
- Nutrition research 2020 v.78 pp. 50-59
- creatinine; excretion; men; protein intake; standard deviation; t-test; urea nitrogen; urine; women; Japan
- ... In this study, we hypothesized that spot urine can be used to predict protein intake at both group and individual levels. Participants (n = 369) of this study were recruited from all 47 prefectures in Japan. Sex-specific formulas were developed based on the ratio of urea nitrogen to creatinine concentration obtained from 3 spot urine samples. Validity of the formulas was examined against two 24-ho ...