Six random specimens of daytime casual urine on different days are sufficient to estimate daily sodium/potassium ratio in comparison to 7-day 24-h urine collections - Iwahori, Toshiyuki; Ueshima, Hirotsugu; Miyagawa, Naoko; Ohgami, Naoto; Yamashita, Hideyuki; Ohkubo, Takayoshi; Murakami, Yoshitaka; Shiga, Toshikazu; Miura, Katsuyuki (Hypertension research, 2014)
Keywords: Adult; Female; Humans; Male; Middle Aged; Potassium - urine; Reference Standards; Reproducibility of Results; Sodium - urine; Urine Specimen Collection - methods