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1950年以来,美国人口迅速稳步增长,65岁以上人口的增长速率比整体人口的增长更快.在1950年,该年龄组占总人口的8.1%.至1979年则占11.2%.人类的理想平均寿命约为85岁,美国白种妇女的估计寿命已接近78岁,而白种男性及黑种男女的估计寿命则较短.55岁以上男女的主要死因顺次为心脏病,癌及脑血管病.高血压既是冠心病又是脑血管病的显著易患因素,故已成为老年人的主要健康问题.老年高血压常同时有收缩压及舒张压增高;但也有很多老人仅收缩压增高,即为单纯性收缩期高血压(收缩压≥160mmHg,舒张压<90mmHg).
The population of the United States has risen rapidly and steadily since 1950, and the population over the age of 65 has grown at a faster rate than the overall population, which accounted for 8.1% of the total population in 1950 and 11.2% in 1979. The human ideal The average life expectancy is about 85 years, the estimated life expectancy of white women in the United States is almost 78 years, and the estimated life expectancy of white men and black men and women is shorter. The main causes of death for men and women over 55 are heart disease, cancer and brain Hypertension is not only a predisposing factor of coronary heart disease but also cerebrovascular disease, which has become the main health problem of the elderly.Hypertension often has systolic and diastolic blood pressure increase at the same time, but there are also many elderly people whose systolic blood pressure only increases , That is, simple systolic hypertension (systolic blood pressure ≥ 160mmHg, diastolic blood pressure <90mmHg).