Associations Between Blood Pressure and Outcomes Among Blacks in the Jackson Heart Study
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- Published on December 10, 2016High quality results, but discussion should be continued
- Anatoly Zhirkov, head of nursing department, Saint Petersburg State University
I read with great interest the paper by Randolph and al, which presented new facts about connection blood pressure (BP) and outcomes among Blacks. The authors used the Jackson Heart Study (JHC) database for statistical analysis. Results of the study look informative and clear.
The discussion and conclusion of this paper, in my opinion, should be wider. For example, authors didn't pay special attention to the connection between DBP/SBP and outcomes. This relation may be interesting because DBP has a high correlation with cardiac output and may be one of the causes of heart failure. On the other hand, in this situation higher SBP is needed to support Mean Blood Pressure (MAP) for better circulation.
The next point for discussion may be accordance between author’s results and JNC8 recommendation. In Figures 1 and 2, we can see that for groups DBP <80, 80 to 89 and SPB <130, 130 to 139 curves looked as the same. These data agree with the JNC8 recommendation for age <60.
The third point for discussion is connection between SBP, age and outcomes. It seems good news for me, as the author of ZhGS formulas, that BP showed rise with age (tab. 1). The same situation we can find if you research correlation between age and mortality or CD and vascular events. So interaction between BP and outcomes may be more complex.Competing Interests: None declared.