The COVID-19 pandemic is associated with higher blood pressure levels among middle-aged adults across the US, according to new research published in the journal Circulation.

According to the American Heart Association, nearly half of American adults have high blood pressure, a leading cause of heart disease, and nearly 75% of all cases remain above the recommended blood pressure levels. Stay-at-home orders were implemented across the U.S. between March and April 2020 in response to the COVID-19 pandemic. This resulted in a shift to remote health care for numerous chronic health conditions including high blood pressure and had a negative impact on healthy lifestyle behaviors for many people.

“At the start of the pandemic, most people were not taking good care of themselves. Increases in blood pressure were likely related to changes in eating habits, increased alcohol consumption, less physical activity, decreased medication adherence, more emotional stress and poor sleep,” said lead study author Luke J. Laffin, M.D., co-director of the Center for Blood Pressure Disorders at the Cleveland Clinic in Cleveland, Ohio. “And we know that even small rises in blood pressure increase one’s risk of stroke and other adverse cardiovascular disease events.”

For this analysis, researchers accessed de-identified health data from an employee wellness program (included employees and spouses/partners) to assess changes in blood pressure levels before and during the COVID-19 pandemic. The data included nearly a half million adults across the U.S., average age of 46 years, 54% women, who had their blood pressure measured  during an employee health screening every year from 2018 through 2020. Participants were categorized into four groups: normal, elevated, stage 1 hypertension and stage 2 hypertension based on the current American Heart Association blood pressure guidelines.

The researchers compared monthly average blood pressures between 2018 and 2019 and blood pressure measures in January through March 2019 to January through March 2020 (pre-pandemic). They then reviewed blood pressure changes comparing April to December 2020 (during the pandemic) to April to December 2019 (pre-pandemic).

The analysis found:

  • During the pandemic (April to December 2020), average increases in blood pressure each month ranged from 1.10 to 2.50 mm Hg higher for systolic blood pressure (the top number in a blood pressure reading that indicates how much pressure the blood is exerting against the artery walls with each contraction) and 0.14 to 0.53 mm Hg for diastolic blood pressure (the bottom number in a blood pressure reading indicates how much pressure the blood is exerting against the artery walls while the heart is resting, between contractions) compared to the same time period in 2019. Before the pandemic, blood pressure measures were largely unchanged when comparing study years.
  • Higher increases in blood pressure measures were seen among women for both systolic and diastolic blood pressure, among older participants for systolic blood pressure, and in younger participants for diastolic blood pressure.
  • From April to December 2020, compared to the pre-pandemic time period, more participants (26.8%) were re-categorized to a higher blood pressure category, while only 22% of participants moved to a lower blood pressure category.

“From a public health perspective, during a pandemic, getting vaccinated and wearing a mask are important. However, the results of our research reinforce the need to also be mindful of chronic health conditions such as the worsening of blood pressure,” Laffin said. “Even in the midst of the pandemic, it’s important to pay attention to your blood pressure and your chronic medical conditions. Get regular exercise, eat a healthy diet, and monitor your blood pressure and cholesterol. See your doctor regularly to learn how to manage your cardiovascular risk factors.”