This observational study examined whether daytime and nighttime blood pressure (BP) levels measured outside a clinical setting are associated with cardiovascular disease (CVD) and risk of death.
Using data from the Jackson Heart Study, which is designed to identify CVD risk factors among African American individuals, this analysis included 1,034 adults who had average daytime and nighttime BP levels calculated based on measurements from a BP monitor on their arm that took readings every 20 minutes during a 24-hour period.
The increase in CVD risk was larger among participants not taking BP medication. A limitation of the study to consider is that 24-hour BP monitoring was performed only once among participants, and the researchers were unable to assess whether changes in daytime and nighttime BP during follow-up were associated with outcomes.
Authors: Yuichiro Yano, M.D., Ph.D., Duke University, Durham, North Carolina, and coauthors. (doi:10.1001/jamacardio.2019.2845)
Editor's Note: The article includes conflict of interest and funding/support disclosures. Please see the article for additional information, including other authors, author contributions and affiliations, financial disclosures, funding and support, etc.
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