南米ブラジルおよびボリビアに居住する日本人と現地住民の尿中Na,K排せつパタンと血圧値に関する比較民族学的研究

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We estimated the sodium and potassium intake of Japanese immigrants in Brazil and Bolivia by casual urine sampling. Urinary Na/K (mEq/mEq), NaCI/Cr (Cr: Creatinine) (g/g) and K/Cr (g/g) were calculated as indices. The Filter Paper Method was used for the collection and transportation of urine. Na, K and Cr concentrations were measured by flame photometry and colorimetry. Brazilian Indians in Amazonas state and native Bolivians in a Japanese settlement were added to the subjects for comparison. We also measured blood pressure level and body dimensions. The following results were obtained. 1) Japanese immigrants had the highest urinary Na/K and NaCI/Cr values, which were 4.20 and 11.64, respectively. There were also differences among each of the settlements. Indians had the lowest values, which were 0.76 and 4.21. Bolivians had intermediate values, which were 2.94 and 6.98. 2) With regard to K/Cr, indians had values (3.94) double those of Japanese (2.08) and Bolivians (1.97). 3) Positive correlation between Na/K or NaCI/Cr, and negative correlation between K/Cr and blood pressure level were found among each group. 4) Indians had no cases of hypertension and no gradual increase of this with age. 5) Daily salt intake of Japanese hypertensive cases in Bolivia was 12.7g, which was estimated by the twenty-four hours excretion of NaCI.
日本民族衛生学会の論文