Validity of salt intake assessment system based on a 24-h dietary recall method using a touch panel computer

Michihiro Satoh, Noriko Kato, Miki Hosaka, Noha Elnagar, Takuya Tsuchihashi, Naoto Yagi, Futoshi Ebara, Kiyoshi Uchiba, Hisao Mori, Mitsutoshi Kato, Hareaki Yamamoto, Katsumi Yoshida, Masaaki Miyakawa, Yutaka Hatori, Yoshiharu Yamamoto, Tomohiro Katsuya, Yoshihiko Watanabe, Shigeo Yatagai, Hiroshi Sato, Yutaka Imai

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3 Citations (Scopus)


Background: An electronic system for salt intake assessment using a 24-h dietary recall method has been developed in Japan. We evaluated the validity of this salt intake system for assessing salt intake. Methods: We prospectively obtained data on estimated salt intake using 24-hour urinary sodium excretion (24-hUNaCl) and salt intake by the salt intake assessment system from 203 consecutive outpatients with essential hypertension (age: 67.8o±o10.7 years; 53.7% men). Results: Mean values were 9.7o±o2.9og/day for 24-hUNaCl and 9.1o±o2.9og/day for the salt intake assessment system before corrections. The salt intake estimated by the present system was significantly correlated with 24-hUNaCl (ro=o0.66, po<o0.0001). After corrections for habitual use of discretionary seasonings, habitual intake of salty foods, and physical activity, correlation coefficients between salt intake and 24-hUNaCl increased from 0.60 to 0.66 in men <65 years, from 0.80 to 0.81 in men 65 years, from 0.64 to 0.75 in women <65 years, and from 0.52 to 0.59 in women 65 years. After further correction for regional differences in average salt intake, the correlation coefficient reached 0.72 in all patients. Conclusion: After correction for dietary habits, lifestyle factors, and differences in average salt intake by region, this system may be a useful tool in Japan to encourage salt restriction in the clinical treatment of hypertension and improve public health in terms of salt restriction overall.

Original languageEnglish
Pages (from-to)471-477
Number of pages7
JournalClinical and Experimental Hypertension
Issue number7
Publication statusPublished - 2014 Nov 1


  • Nutrition survey
  • Salt intake
  • Urinary salt excretion
  • Validation


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