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. 2017 Aug 8;7:7542. doi: 10.1038/s41598-017-07449-5

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(A) Comparison of HTN prevalence and treatment, and control rate according to frailty status. (*P value < 0.001, ^† P value = 0.005). HTN prevalence was higher in frail elderly than pre-frail or robust elderly. (P < 0.001) In hypertensive patients, frail elderly are more likely to be treated than pre-frail or robust elderly (P < 0.001). In treated patients, the proportion of patients whose blood pressure was controlled under 150/90 mmHg was significantly lower in frail elderly (P = 0.005). (B) Comparison of SBP and DBP control rate in treated patients according to frailty status. (^‡ P value = 0.020, ^§ P value = 0.032). SBP: systolic blood pressure, DBP: diastolic blood pressure. In treated patients, the proportion of patients whose systolic blood pressure was controlled under 150 mmHg was significantly lower in frail elderly (P = 0.020), and the proportion of patients whose diastolic blood pressure was controlled under 90 mmHg was also lower in frail elderly (P = 0.032).