Fig. 3

Distributions of casual urine Na/K ratio in men and women, NIPPON DATA2010. Na/K ratio was assessed based on the single measurement of casual urine samples. No. (%) of participants with casual urine Na/K ratio of <2, 2 to 3.9, and ≥4.0 were 156 (13.0), 503 (42.0), and 539 (45.0), respectively, for men and 216 (13.5), 645 (40.3), and 738 (46.2), respectively, for women. NIPPON DATA2010, the National Integrated Project for Prospective Observation of Non-communicable Disease and its Trends in the Aged 2010; Na/K, sodium-to-potassium; SD, standard deviation