Studies on Estimation of 24-hour Urinary Salt and Potassium Excretion from Overnight Urinary data

• Published in: Japanese Journal of Cardiovascular Disease Prevention Vol. 41; no. 1; pp. 32 - 39
• Main Authors: Inma, Yasushi, Tochikubo, Osamu, Kanekuni, Nobuhiko
• Format: Journal Article
• Language: Japanese
• Published: The Japanese Association for Cerebro-cardiovascular Disease Control 2006; 社団法人 日本循環器管理研究協議会
• Subjects: hypertension; urinary potassium; urinary salt; 予防; 尿; 尿カリウム; 尿塩分; 高血圧
• ISSN: 1346-6267
• DOI: 10.11381/jjcdp2001.41.32

The purpose of this study was to estimate 24-hour urinary salt and potassium excretion (Q24NaCl and Q, respectively) from the first morning voided urine specimens (Q8NaCl and Q8K). Data was collected from 5 subjects over a period of 1 month and regression analyses were performed to estimate Q24NaCl and Q24k from Q24K from_Q8NaCl and Q8K. The correlation formulas obtained were : Solt : Q24NaCl=2.35×Q8Nacl+3.80 (Correlation coefficient 0.80) Potassium : Q24K=2.66×Q8K+2.66 (correlation coefficient 0.63) The maximum target intakes for potassium and sodium, as recommended by Healthy Japan 21, were converted into equivalent urinary excretion values for comparison. While our measured values for both solt and potassium, Q24NaCl and Q24K, did not exceed the targeted recommendations, room for improvement in dietary habits was indicated. Our results also indicate the possibility of further study into the correlation of solt and potassium to amount of meals and to a meal balance index.