The study, led by an international team of researchers from India, the United States, New Zealand, Brazil and the United Arab Emirates, showed that air pollution contributed to 14 percent of the deaths and disabilities caused by this serious subtype of stroke. along with smoking.

The study showed that, together with air pollution, high temperatures and metabolic disorders, they drove a significant increase in global stroke cases and deaths over the past three decades.

The number of people worldwide who suffered a new stroke increased to 11.9 million in 2021, up 70 percent since 1990. Stroke-related deaths increased to 7.3 million, up 44 percent since 1990.

The study identified 23 modifiable risk factors responsible for 84 percent of the stroke burden in 2021.

In 2021, the top five global risk factors for stroke were high systolic blood pressure, particulate air pollution, smoking, high LDL cholesterol, and household air pollution, with considerable variations by age, sex and location.

It also showed substantial progress in reducing the global burden of stroke by reducing particulate air pollution (20 percent) and smoking (13 percent).

“Given that 84 percent of the stroke burden is related to 23 modifiable risk factors, there are enormous opportunities to alter the trajectory of stroke risk for the next generation. Given that ambient air pollution is reciprocally related to ambient temperature and climate change, the importance of urgent climate actions and measures to reduce air pollution cannot be overestimated,” said co-author Dr. Catherine O. Johnson. , senior research scientist at the University of Washington. Institute for Health Metrics and Evaluation (IHME).

While stroke is now the third leading cause of death worldwide (after ischemic heart disease and Covid-19), the condition is highly preventable and treatable.

The researchers called for identifying sustainable ways to work with communities to take action to prevent and control modifiable risk factors such as high blood sugar and a diet high in sugary drinks. There is a critical need for interventions focused on obesity and metabolic syndromes, Johnson said.

They also called for measures such as clean air zones and public smoking bans, which have been successful.

Findings based on the Global Burden of Diseases, Injuries and Risk Factors (GBD) Study showed that more than three-quarters of people affected by stroke live in low- and middle-income countries (LMICs).

The study also found that worldwide, the total number of adjusted life years (DALYs) from disability, illness and premature death increased by 32 percent between 1990 and 2021, rising from around 121.4 million life years healthy lost in 1990 to 160.5 million years in 2021.