Blood pressure variability linked to higher death and stroke risk in UK Biobank study

A study of over 57,000 UK Biobank participants reveals that high blood pressure variability between clinical visits is linked to elevated risks of death and stroke, independent of average blood pressure. This risk is nearly tripled for individuals with coexisting type 2 diabetes. Meanwhile, a massive English study of 1.4 million adults shows that 37% have hypertension, with 59% of those cases remaining undiagnosed. These findings emerge alongside rising stroke rates in young adults, highlighting the critical need for routine screening and dietary interventions like balancing sodium with potassium.

Blood pressure variability and health risks

• ▪Greater variability in diastolic blood pressure and mean arterial pressure was associated with a 12% and 10% higher likelihood of stroke, respectively, per one-standard-deviation increase.
• ▪UK Biobank participants with type 2 diabetes and high systolic blood pressure variability had a 2.8 times higher risk of death during the follow-up period compared to those with normal blood sugar and low variability.
• ▪An analysis of 57,611 UK Biobank participants found each one-standard-deviation increase in systolic blood pressure variability was associated with an 11% higher risk of death, and diastolic variability with an 8% higher risk.

Hypertension prevalence in England

• ▪A study of 1.4 million adults in England recruited to the Our Future Health programme found that 37% had hypertension, and 59% of those individuals were previously undiagnosed and not taking medication.
• ▪The Our Future Health study found that hypertension prevalence rose from 15% among adults aged 18 to 39 to 71% among those aged 80 and over.
• ▪After adjusting for age, hypertension in the Our Future Health study was more common in men than in women, affecting 42% of men compared to 29% of women.

NHS England blood pressure survey

• ▪An NHS England survey of adults aged over 40 found that 44% were unaware they could receive a free blood pressure check at a community pharmacy.
• ▪An NHS England survey found that 17% of people who had not recently measured their blood pressure avoided doing so because they did not feel unhealthy or stressed.

Blood pressure testing

• ▪The National Institute for Health and Care Excellence recommends confirming suspected hypertension using 24-hour ambulatory monitoring or multiple home measurements over seven days.
• ▪NHS England's pharmacy service allows blood pressure check referrals from GPs and other healthcare professionals, including dentists and optometrists.

Stroke trends in younger adults

• ▪A study of stroke cases in people aged 20 to 54 in the Greater Cincinnati and Northern Kentucky region found that young adults in 2020 were almost twice as likely to have a stroke as they were in 1993.
• ▪The proportion of younger stroke patients with documented substance use in the Greater Cincinnati and Northern Kentucky region rose from 4.6% in 1993-94 to 40.2% in 2020, largely driven by marijuana use.
• ▪Among younger stroke patients in the Greater Cincinnati and Northern Kentucky region, high blood pressure rates rose from 47.3% to 60.3% between 1993 and 2020.

Dietary sodium and blood pressure

• ▪Public health research suggests that balancing sodium intake by significantly increasing dietary potassium is a critical, often overlooked component of managing blood pressure.
• ▪Excess dietary sodium drives the global hypertension crisis and contributed to an estimated 1.7 million deaths in 2023, according to the World Health Organization.

Debatable claims

• ▪Clinical health assessments should routinely incorporate blood pressure variability
• ▪Screening adults under 40 for hypertension is justified by rising young adult stroke rates