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26. Blood pressure, hypertension and the risk of aortic dissection incidence and mortality: results from the Japan-specific health checkups study, the UK biobank study and a metaanalysis of cohort studies

Author

Hibino, M, Otaki, Y, Kobeissi, E, Pan, H, Hibino, H, Taddese, H, Majeed, Z, Verma, S, Konta, T, Yamagata, K, Fujimoto, S, Tsuruya, K, Narita, I, Kasahara, M, Shibagaki, Y, Iseki, K, Moriyama, T, Kondo, M, Asahi, K, Watanabe, T, Watanabe, M, and Aune, D

Subjects
hypertension, blood pressure, 1103 Clinical Sciences, aneurysm, dissecting, United Kingdom, 1117 Public Health and Health Services, meta-analysis, cohort studies, Japan, Cardiovascular System & Hematology, Risk Factors, Humans, 1102 Cardiorespiratory Medicine and Haematology, dose-response relationship, drug, Biological Specimen Banks
Abstract

Background: Hypertension or elevated blood pressure (BP) is an important risk factor for aortic dissection (AD); however, few prospective studies concerning this topic have been published. We investigated the association between hypertension/elevated BP and AD in two cohorts and conducted a meta-analysis of published prospective studies, including these two studies. Methods: We analyzed data from the Japan Specific Health Checkups (J-SHC) Study and UK Biobank, which prospectively followed 534,378 and 502,424 participants, respectively. Multivariable Cox regression was used to estimate hazard ratios (HRs) and 95% confidence intervals (95% CIs) for the association of hypertension/elevated BP with AD incidence in the UK Biobank and AD mortality in the J-SHC Study. In the meta-analysis, summary relative risks (RRs) were calculated using random effects models. A potential nonlinear dose-response relationship between BP and AD was tested using fractional polynomial models, and the best-fitting second-order fractional polynomial regression model was determined. Results: In the J-SHC Study and UK Biobank, there were 84 and 182 ADs during 4- and 9-year follow-up, and the adjusted HRs of AD were 3.57 (95% CI, 2.17-6.11) and 2.68 (95% CI: 1.78-4.04) in hypertensive individuals, 1.33 (95% CI: 1.05-1.68) and 1.27 (95% CI: 1.11-1.48) per 20-mmHg increase in systolic BP (SBP), and 1.67 (95% CI: 1.40-2.00) and 1.66 (95% CI: 1.46-1.89) per 10-mmHg increase in diastolic BP (DBP), respectively. In the meta-analysis, the summary RRs were 3.07 (95% CI 2.15-4.38, I2=76.7%, n=7 studies, 2,818 ADs, 4,563,501 participants) for hypertension and 1.39 (95% CI: 1.16-1.66, I2=47.7%, n=3) and 1.79 (95% CI: 1.51-2.12, I2=57.0%, n=3) per 20-mmHg increase in SBP and per 10-mmHg in DBP, respectively. The AD risk showed a strong, positive dose-response relationship with SBP and even more so with DBP. The risk of AD in the nonlinear dose-response analysis was significant at SBP >132 mmHg and DBP >75 mmHg. Conclusions: Hypertension and elevated SBP and DBP are associated with a high risk of AD. The risk of AD was positively dose-dependent, even within the normal BP range. These findings provide further evidence for the optimization of BP to prevent AD.

Published
2021

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