Poulter N, Khaw K T, Hopwood B E, Mugambi M, Peart W S, Rose G, Sever P S
J Epidemiol Community Health. 1984 Sep;38(3):181-5. doi: 10.1136/jech.38.3.181.
As part of a longitudinal study of migrants who move from a subsistence farming rural society to Nairobi, blood pressures and associated factors were measured in cross sectional studies of members of the Luo tribe in their traditional rural environment and in the urban environment of Nairobi. Blood pressures in Nairobi correlated with duration of urban residence. In the rural area men showed a negligible rise in blood pressure with age, and both sexes showed a significantly smaller rise than in the urban area. Although mean weights of the rural group were smaller, this did not account for all the urban/rural differences in blood pressures. Nevertheless, mean urinary sodium concentration and sodium ratios (sodium/potassium and sodium/creatinine) were significantly higher in the urban group whereas mean urinary potassium concentration and potassium/creatinine ratio were significantly lower. Perhaps the ratio of sodium to potassium in the diet contributes to the different blood pressure profiles of these two populations.
作为一项对从自给自足的农村社会迁移至内罗毕的移民进行的纵向研究的一部分，在对卢奥部落成员于其传统农村环境及内罗毕城市环境中开展的横断面研究里，测量了血压及相关因素。内罗毕的血压与城市居住时长相关。在农村地区，男性血压随年龄增长升高幅度可忽略不计，且两性血压升高幅度均显著小于城市地区。尽管农村组的平均体重较低，但这并不能解释血压方面所有的城乡差异。然而，城市组的尿钠平均浓度及钠比值（钠/钾和钠/肌酐）显著更高，而尿钾平均浓度及钾/肌酐比值显著更低。或许饮食中钠与钾的比例导致了这两个人群不同的血压状况。
