Blood Pressure and Age

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  • 加齢と血圧
  • カレイ ト ケツアツ

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Relationship between change of blood pressure (BP) and age was studied from the result of cardiovascular survey on 10, 210 apparently healthy employees of Tokyo Metropolitan Government, ranging in age from 15 to 84 years. Right-arm sitting BP was measured by specially trained paramedical personnels. Differences of BP among 27 groups classified by age and sex were statistically analyzed. The data showed a continuous increase of systolic BP with aging, starting from 20-24 years in male and from 30-34 years in female. Diastolic BP also increased gradually, from third decade in male and fourth decade in female, until 54-59 years of age, after which there was no significant change. As a result pulse pressure rose markedly after 50-54 age, but a increase of mean BP was recognized in the period of age from 20-24 to 60-64 in male and from 30-34 to 65-69 in female. Females had lower BP than males.<br>Systolic BP was positively related to diastolic BP in each age groups. All of these correlation coefficients were over 0.5 except for two younger groups. Linear regression equations were computed and regression lines of systolic BP to diastolic BP were compared among each groups. There was a constant slope of those lines in 30-54 in male and in 15-49 in females. After sixth decade the slope became steeper with advancing age, indicating systolic hypertension in older people.

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