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Prehypertension is defined as borderline blood pressure levels that do not fall in the range defined as hypertension. Since the definition of hypertension has changed over the years, the definition of prehypertension has changed too. The term “prehypertension” was used in 2003, by the Joint National Committee on Hypertension. However, already in the 1920s and 1930s, insurance companies used the term prehypertension for slightly elevated blood pressure levels which were well within the normal range but were clearly associated with increased morbidity and mortality. These data, accumulated by insurance companies, were used for risk calculation in order to price insurance policies. |
