... that Hypertension: Principles and Practice will serve our many hypertension patients by supportingtheir health care providers with a useful and comprehensive source of accurate information and ... 2, and stage 3 hyper-tension was 19.9%, 7.4%, and 3.8%, respectively, in theNorth, and 14.2%, 4.6%, and 2.1%, respectively, in theSouth. There was no significant difference betweenurban and ... popu-lation are a lower intake of potassium and calcium and agreater salt sensitivity (55).28 History, Definitions, and Epidemiology2Definition and Classification of HypertensionGIUSEPPE MANCIA,...