Saturday August 18, 2018

According To Study, Ozone Exposure At Birth May Up Asthma Risk

Exposure to ozone (O3) -- a common air pollutant -- at birth may increase the risk of developing asthma by age three, a new study suggests.

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Exposure to ozone (O3) — a common air pollutant — at birth may increase the risk of developing asthma by age three, a new study suggests.

The study, presented at the 2018 American Thoracic Society International Conference, showed that 31 per cent of the participants developed asthma, 42 per cent had allergic rhinitis and 76 per cent had eczema.

“Our findings show that the hazard ratios for ozone measured at birth as a single pollutant showed statistically significant higher risks for development of asthma, allergic rhinitis and eczema,” said lead author Teresa To from The Hospital for Sick Children (SickKids) in Canada.

The study also found that 82 per cent higher risk of developing asthma was associated with each 10 parts per billion (ppb), or ppb increase in exposure to ozone at birth.

For the study, 1,881 children were recruited who were followed from birth to 17 years of age, on average.

Childhood asthma can trigger COPD in later life. IANS

 

According to the researchers, children are at a higher risk because their lungs and other respiratory organs are smaller, and they spend more time in outdoor physical activities that make them breathe faster and more deeply.

The research team took annual average concentrations of pollutants from fixed monitoring stations.

Development of asthma, allergic rhinitis and eczema were determined based on any records of health services used for these conditions.

The researchers adjusted for variables such as parental history of asthma and early home exposure to pollutants.

Earlier, some studies have shown that ozone depletes antioxidant activity and increases indications of inflammation in the respiratory tract fluid lining and affects lung growth.

Also Read: Exposure to Traffic-Related Pollution Poses Threat of Asthma in Kids

“Air pollution isn’t only one or a few countries’ problems, but rather a global public health concern,” said To, also a professor at the University of Toronto.

“While there are individual actions one can consider to reduce exposure to air pollutants, it also requires action by public authorities at the national, regional and international levels,” she noted. (IANS)

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40% of Women with Asthma Have a Risk of Developing Chronic Lung Diseases

Previous studies have found an alarming rise in ACOS in women in recent years and that the mortality rate from ACOS was higher in women than men.

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Asthma inhaler
The researchers examined risk factors for developing asthma and COPD overlap syndrome, known as ACOS.. Flickr Commons

More than 4 in 10 individuals with asthma run the risk of developing chronic obstructive pulmonary disease (COPD), a group of lung diseases that block airflow and make it harder to breathe, says a new study involving around 4,000 women.

The researchers examined risk factors for developing asthma and COPD overlap syndrome, known as ACOS.

The findings, published in the journal Annals of the American Thoracic Society, showed that individual risk factors played a more significant role in the development of ACOS than exposure to fine particulate matter, a major air pollutant that because of its microscopic size penetrates deep into the lungs.

Women who had smoked more than the equivalent of a pack of cigarettes a day for five years, were much more likely to develop ACOS than those who smoked fewer cigarettes or never smoked.

However, ACOS did not affect only those who smoke as the researchers found that 38 per cent of the women who developed ACOS in the study had never smoked.

Lady With An Asthma Inhaler
The study also identified obesity, rural as significant risk factors for ACOS. VOA

The study also identified obesity, rural residence, lower education levels and unemployment as significant risk factors for ACOS.

The authors believe that these factors may result in suboptimal access to care, under-treatment of asthma and poor compliance to medications, all of which lead to more frequent asthma attacks.

These attacks in turn may lead to airway remodelling that increases the chances of developing ACOS.

Also Read: Lung Function Decline in Elderly Can be Delayed by Consuming Flavonoid

“Previous studies have found an alarming rise in ACOS in women in recent years and that the mortality rate from ACOS was higher in women than men,” said Teresa To, Professor atUniversity of Toronto in Canada.

“We urgently need to identify and quantify risk factors associated with ACOS in women to improve their health and save lives,” To added. (IANS)