Women May Experience More Cognitive Effects from Dementia Risk Factors
A recent study indicates that women might be more affected than men by common risk factors associated with dementia. This research from the University of California San Diego School of Medicine suggests that prevention strategies for dementia could benefit from being tailored by sex.
Dementia is a term that covers various conditions impacting memory and daily activities, with Alzheimer’s disease being the most prevalent type. In the U.S., approximately two-thirds of individuals living with Alzheimer’s are women, a notable difference that isn’t solely due to women living longer. Researchers are looking into biological, social, and lifestyle factors to explain this gap.
The study analyzed data from over 17,000 middle-aged and older adults who participated in the Health and Retirement Study, a national research project.
Different Risk Profiles for Women and Men
Researchers examined 13 known dementia risk factors that can often be modified through lifestyle changes or medical treatment, such as depression, inactivity, smoking, hearing loss, obesity, high blood pressure, diabetes, and educational level.
Results showed some important differences between genders. Women reported higher levels of depression, inactivity, and sleep issues. For instance, 17% of women reported feeling depressed, compared to 9% of men. Women also generally had lower education levels, which is also linked to cognitive decline later in life.
On the other hand, men had higher rates of hearing loss, diabetes, and heavy alcohol consumption. High blood pressure was common in both genders, affecting roughly 60% of participants. Both genders showed BMI (Body Mass Index) scores in the overweight to obese range.
“Understanding these differences can help us create more effective interventions,” said Megan Fitzhugh, PhD, from UC San Diego. “This is crucial for reducing the impact of dementia, especially for women who are more at risk.”
Some Risk Factors Affect Women More Strongly
The research also showed that certain risk factors had a stronger impact on cognitive performance in women compared to men. For instance, cardiovascular issues, like high blood pressure and higher BMI, led to more significant cognitive decline among women. Additionally, while hearing loss and diabetes were more common in men, they were more strongly linked to cognitive issues in women.
These findings indicate that not all health conditions affect dementia risk equally between genders. Therefore, prevention efforts may be more effective if they consider both the prevalence and the impact of certain risk factors on cognitive health.
Researchers remind us that many of these risk factors can be managed. For example, addressing depression, maintaining physical activity, and controlling high blood pressure may contribute to long-term brain health. Further studies are needed to understand the reasons behind these differences and how they can improve prevention strategies for dementia.
Smart Wristband Could Detect Cardiac Arrest Early, Study Suggests
New wearable technology might soon assist in saving lives by automatically identifying cardiac arrest and alerting emergency services, according to a recent study from the American Heart Association.
Researchers in the Netherlands tested a smart wristband that monitors blood flow using light-based sensors, much like those found in many smartwatches. The aim was to determine if the device could quickly detect when a heart stops pumping blood effectively, known as cardiac arrest.
Results were published in the journal Circulation: Arrhythmia and Electrophysiology.
Testing the Device During Heart Procedures
The study involved 49 adults with serious heart rhythm issues undergoing procedures to correct abnormal heartbeats. Doctors temporarily triggered risky heart rhythms in a controlled hospital scenario to test if the wristband could identify cardiac arrest.
Researchers focused on two dangerous heart rhythms: ventricular fibrillation and pulseless ventricular tachycardia, both of which can prevent the heart from circulating blood and can lead to death without immediate action.
The wristband successfully detected cardiac arrest 92% of the time and caught all instances of ventricular fibrillation and 90% of pulseless ventricular tachycardia. The device also had relatively few false alarms over 125 hours of monitoring.
Acting as a “Digital Witness”
Dr. Judith Bonnes from Radboud University Medical Center suggested that the technology could act as a “digital witness” during sudden cardiac arrests, especially when a person is alone and unable to seek help.
In future models, the wristband could alert emergency services or trained volunteers automatically upon detecting cardiac arrest. Quick response is crucial, as survival chances can diminish quickly without CPR or defibrillation.
Experts not involved in the study find the results encouraging, especially with the low rate of false alerts.
Need for More Research
Researchers noted that the study was small and conducted in a medical environment. The technology has not yet been tested in everyday situations like walking or sleeping. Further studies are needed to see if the wristband can reliably detect cardiac arrest in real-life settings. However, researchers believe that wearable technology could eventually play a significant role in providing timely assistance during cardiac emergencies.
Better Heart Health Linked to Lower Severe COVID-19 Risk
People who had better heart health before the COVID-19 pandemic were less likely to experience severe illness or death from the virus, as shown in a new study published in the Journal of the American Heart Association.
Researchers found that those with high scores on the American Heart Association’s “Life’s Essential 8” heart health checklist were nearly half as likely to be hospitalized or die from COVID-19 compared to those with lower scores. This study analyzed data from nearly 30,000 adults and adds to the understanding that cardiovascular health may affect how the body copes with severe infections.
What is Life’s Essential 8?
Life’s Essential 8 measures heart health through eight factors: diet, physical activity, smoking status, sleep, body weight, blood pressure, cholesterol, and blood sugar levels. Scores range from 0 to 100, with higher scores indicating better heart health.
The study found that adults with scores from 80 to 100 had 46% lower risk of severe COVID-19 outcomes than those scoring below 50. Moreover, a 14-point increase in a person’s score correlated with a 20% lower risk of hospitalization or death from COVID-19.
Specific health factors, such as higher physical activity, healthy body weight, normal blood pressure, and good sleep habits, were linked to a lower risk of severe illness.
Healthy Habits Help Manage Stress
The study focused on adults without existing cardiovascular disease, aiming to highlight how heart health influences the body’s response to infections. Severe COVID-19 cases were defined as those resulting in hospitalization or death.
Dr. Tim Plante, the lead author, stated that these findings suggest that strong heart health and healthy habits may better equip the body to handle stress from viral infections. “COVID-19’s impact could have been lessened if the general public had better heart health before the pandemic,” Dr. Plante noted.
With over 1.2 million COVID-19 fatalities in the U.S. from March 2020 to March 2025, understanding ways to reduce severe outcomes is vital.
Importance of Prevention
Healthcare experts not involved in the study emphasized these findings underline the broader benefits of healthy lifestyle choices. In addition to preventing heart disease, habits like regular exercise, quality sleep, and maintaining healthy blood pressure may also shield against severe complications from respiratory infections such as COVID-19. Vaccination remains essential, especially for older adults and those with poorer heart health scores or existing heart conditions.
