To investigate the prevalence status of the isolated systolic hypertension (ISH) among the elderly Chinese population and analyze risk factors of ISH.
The survey was conducted from September 2015 to September 2016 enrolling 1269 people aging above 80 in the urban community in Chengdu, China. The participants were recruited by using a stratified cluster sampling method. The average blood pressure of an individual was obtained by using a standardized mercury sphygmomanometer to measure the blood pressure twice after a 10-minute seated rest.
The prevalence of ISH was 53.0% among the elderly population; the ISH was accounted for 82.2% of all hypertension cases. The prevalence of ISH of males and females was 54.7% and 51.5%, respectively, without significant differences (P = 0.25). The prevalence of ISH in the 80–84 group, 85–89 group, and > 90 group were 52.5%, 53.0%, and 60.0%, respectively without significant differences (P for trend = 0.36). Multivariate logistic regression analysis showed that drinking alcoholic, obesity, and heart rate (HR) > 75 beats/min were all positively correlated to the incident of ISH; however, physical exercise was negatively correlated to the occurrence of ISH.
53.0% of the elderly Chinese population aged above 80 has ISH. The gender and physical exercise are not the independent risk factor of ISH. But drinking alcoholic, obesity and HR > 75 are significantly related to the occurrence of ISH.