Langford H G
Ann Intern Med. 1983 May;98(5 Pt 2):770-2. doi: 10.7326/0003-4819-98-5-770.
The strong geographic and social class differences in blood pressure may be related to differences in potassium intake or in the ratio of sodium to potassium intake. "Low salt" populations also have high potassium intake. In Japanese villages, populations with similar salt intake but different blood pressures had different potassium intake. In one study, a significant correlation was found between urinary Na/K ratio and blood pressure. Another study showed a significant negative correlation between potassium excretion and blood pressure. Four studies are available that show that blacks excrete much less potassium than whites. One of these studies also showed, by analyzing duplicate meals, that blacks consumed much less potassium than whites. A high potassium diet tends to be more expensive than a low potassium diet. Potassium intake may be a major factor in the epidemiologic differences of hypertension.
血压方面存在的显著地理和社会阶层差异可能与钾摄入量或钠钾摄入比例的差异有关。“低盐”人群的钾摄入量也很高。在日本农村，盐摄入量相似但血压不同的人群钾摄入量也不同。一项研究发现尿钠/钾比值与血压之间存在显著相关性。另一项研究表明钾排泄与血压之间存在显著负相关。有四项研究表明，黑人的钾排泄量比白人少得多。其中一项研究通过分析重复饮食还表明，黑人摄入的钾比白人少得多。高钾饮食往往比低钾饮食更昂贵。钾摄入量可能是高血压流行病学差异的一个主要因素。
