Who is at risk for stroke
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Who is at Risk for Stroke?
Nonmodifiable Risk Factors: Age, Sex, and Race/Ethnicity
Age
Age is a significant nonmodifiable risk factor for stroke. The incidence of stroke increases with age, making older adults particularly vulnerable Boehme2017Wolf1991Mustacchi1985.
Sex
Sex also plays a role in stroke risk. Men generally have a higher risk of stroke compared to women, although women tend to have worse outcomes when they do experience a stroke Boehme2017Wolf1991.
Race/Ethnicity
Race and ethnicity are crucial factors. For instance, nonwhite populations in the United States have a higher stroke mortality rate compared to their white counterparts, which may not be entirely explained by the prevalence of hypertension Boehme2017Mustacchi1985.
Modifiable Risk Factors: Hypertension, Smoking, Diet, and Physical Inactivity
Hypertension
Hypertension is the most powerful and reversible risk factor for stroke. It significantly increases the likelihood of both ischemic and hemorrhagic strokes Boehme2017Wang2017Mustacchi1985+1 MORE.
Smoking
Smoking is another critical modifiable risk factor. It contributes to the development of atherosclerosis and other cardiovascular conditions that can lead to stroke Boehme2017Feigin2016Mustacchi1985.
Diet and Physical Inactivity
Poor diet and lack of physical activity are also significant contributors. These factors can lead to obesity, diabetes, and high cholesterol, all of which increase stroke risk Boehme2017Feigin2016Wang2017.
Emerging Risk Factors: Inflammatory Disorders, Infection, and Pollution
Inflammatory Disorders and Infection
Recent research has identified inflammatory disorders and infections as potential triggers for stroke. These conditions can cause systemic inflammation, which may contribute to stroke risk .
Pollution
Environmental factors like air pollution have emerged as significant contributors to stroke, particularly in low-income and middle-income countries .
Genetic Factors: Single-Gene Disorders and Polymorphisms
Single-Gene Disorders
Certain rare, hereditary disorders caused by single-gene mutations can make individuals more susceptible to stroke .
Genetic Polymorphisms
Both common and rare genetic polymorphisms can influence stroke risk. These genetic factors often interact with environmental factors, making them potentially modifiable .
Specific Populations at Higher Risk
Cancer Survivors
Cancer survivors, particularly those with head and neck, hematologic, lung, pancreas, and stomach cancers, have a higher risk of stroke compared to cancer-free populations. This risk is more pronounced in younger survivors and those with a shorter duration of cancer survival Zhang2020Demel2018.
Diabetics
Individuals with type 2 diabetes are at a significantly higher risk of stroke. Factors such as older age, male sex, smoking, and poor glycemic control further exacerbate this risk Kim2020Zaorsky2019.
Global and Regional Variations
Global Burden
Globally, more than 90% of the stroke burden is attributable to modifiable risk factors. Behavioral factors like smoking, poor diet, and low physical activity account for a substantial portion of this burden .
Regional Differences
The lifetime risk of stroke varies significantly by region. For example, East Asia, Central Europe, and Eastern Europe have the highest lifetime risks, while sub-Saharan Africa has the lowest .
Conclusion
Understanding who is at risk for stroke involves a multifaceted approach that considers both nonmodifiable and modifiable risk factors. Age, sex, and race/ethnicity are significant nonmodifiable factors, while hypertension, smoking, diet, and physical inactivity are critical modifiable factors. Emerging risk factors like inflammatory disorders, infection, and pollution also play a role. Specific populations, such as cancer survivors and diabetics, are at higher risk. Addressing these risk factors through lifestyle changes and medical interventions can significantly reduce the global burden of stroke.
Sources and full results
Most relevant research papers on this topic
Risk Factors for Stroke in the Chinese Population: A Systematic Review and Meta-Analysis.
Hypertension and diabetes are the strongest risk factors for stroke in Chinese populations, and giving all risk factors equal weighting may not be appropriate for screening.
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