Abstract
BackgroundThere were little national data on hypertension based on the oldest-old, and lack of information on chronological changes. This study aimed to describe trends of blood pressure (BP) levels and hypertension prevalence for the past 16 years among the oldest-old in China.MethodsAll the oldest-old who had participated in the Chinese Longitudinal Healthy Longevity Survey (CLHLS) 1998 to 2014 with information about BP levels and hypertension were included in the analysis.ResultsThere was fluctuation over the past 16 years for both SBP and DBP levels. The mean SBP level decreased from 148.4 ± 24.4 mmHg in 1998 to 130.8 ± 18.7 mmHg in 2005, and then increased to 139.7 ± 22.0 mmHg in 2014. The mean DBP level decreased from 84.3 ± 13.4 mmHg in 1998 to 78.9 ± 11.7 mmHg in 2008, and then increased to 79.7 ± 11.8 mmHg in 2014. The hypertension prevalence increased from 43.1 to 56.5% for the 16 years. The prevalence of isolated systolic hypertension was lowest in 2002–2005 (14.3%), and then increased to 30.7% in 2014. Multivariate logistic regression showed that older age, lower education and economic level, without health insurance were associated with higher hypertension prevalence.ConclusionsThere was a significant increase in hypertension prevalence among the Chinese oldest-old from 1998 to 2014. Greater efforts are needed for hypertension prevention among this specific population.
Highlights
There were little national data on hypertension based on the oldest-old, and lack of information on chronological changes
Study design All the participants were from the seven waves of Chinese Longitudinal Healthy Longevity Survey (CLHLS), and those who aged more than 80 years old with complete records on blood pressure (BP) and hypertension information were included
Definitions According to the BP levels, participants were divided into the following groups: normal BP, systolic blood pressure (SBP) ≤ 120 mmHg and diastolic blood pressure (DBP) ≤80 mmHg among those who had never been diagnosed with hypertension; high-normal BP, 120 mmHg
Summary
There were little national data on hypertension based on the oldest-old, and lack of information on chronological changes. This study aimed to describe trends of blood pressure (BP) levels and hypertension prevalence for the past 16 years among the oldest-old in China. Hypertension is one of the important risk factors for cardiovascular disease. It is important to understand the epidemic trend of hypertension. There was a lack of basic data about hypertension prevalence among the oldest-old (aged 80 and over) in China. There were little national data on hypertension based on the oldest-old. Most studies were based on one time survey, the chronological changes had never been reported, which was a reflection of effects about national control measures of hypertension
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