Trends in blood pressure and prevalence of hypertension in Korean adults based on the 1998–2014 KNHANES

Purpose: To investigate trends in blood pressure (BP) and hypertension prevalence in Korea. Materials and Methods: Based on the Korean National Health and Nutrition Examination Survey (KNHANES) I (1998), II (2001), III (2005), IV (2007−2009), V (2010−2012), and VI (2013−2014), 56077 participants (23974 men and 32103 women) were included. Results: Mean systolic BP (SBP) and diastolic BP (DBP) decreased in both sexes (male SBP: 128.1 to 120.2 mm Hg, male DBP: 82.0 to 78.5 mm Hg; female SBP: 125.7 to 116.0 mm Hg and female DBP: 77.4 to 73.2 mm Hg from the KNHANES I–VI). The agestandardized prevalence of hypertension was significantly decreased in both sexes (male; 33.3% to 30.3%, female; 28.7% to 22.7%, all p for trend <0.001). Regardless of taking anti-hypertensive medication or not, SBP and DBP declined universally in both sexes. Compared to the KNHANES I, the odds ratios (95% confidence intervals) of the KNHANES II to VI for less-than-normotensive and less-than-hypertensive BP increased in both sexes. Conclusion: Mean BP levels in both sexes and hypertension prevalence showed downward trends during the 16-year period.