Saturday December 7, 2019

Light Smoking also Damages Lungs, Says Study

Lung function in Light smokers declines at a rate much closer to that of Heavy smokers

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Smoking
Lung function declines naturally with age (starting in one's 20s), and Smoking accelerates the decline. Pixabay

People smoking fewer than five cigarettes a day cause long-term damage to their lungs, according to a new research.

“Many people assume that smoking a few cigarettes a day isn’t so bad, but it turns out that the difference in loss of lung function between someone who smokes five cigarettes a day versus two packs a day is relatively small,” said study lead author Elizabeth Oelsner, Assistant Professor at Columbia University Vagelos College in the US.

For the study published in The Lancet Respiratory Medicine, the researchers looked specifically at lung function–the amount of air a person can breathe in and out–in smokers, ex-smokers, and never-smokers.

Lung function declines naturally with age (starting in one’s 20s), and it’s well-known that smoking accelerates the decline.

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Light Smoking can cause about the same amount of lung function damage in one year as a Heavy Smoking might cause in nine months. Pixabay

Because of the large number of people in the study–more than 25,000– researchers could see differences in lung function among light smokers (less than 5 cigarettes per day) and heavy smokers (more than 30 per day) that other studies have been unable to detect.

Their analysis found that lung function in light smokers declines at a rate much closer to that of heavy smokers, as compared to non-smokers.

This means that a light smoker could lose about the same amount of lung function in one year as a heavy smoker might lose in nine months.

Smoking
Smoking fewer than five cigarettes a day cause long-term damage to the lungs. Pixabay

The study also tested an assumption, based on a 40-year-old study, that the rate of decline in lung capacity “normalises” within a few years of quitting smoking.

The new study shows that although lung capacity declines at a much lower rate in ex-smokers than current smokers, the rate doesn’t normalise for at least 30 years.

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According to the researchers, light smokers may have a greater risk of developing chronic obstructive pulmonary disease (COPD). (IANS)

Next Story

Reduction in Air Pollution May Increase Life-Expectancy: Study

Findings of a Research indicate almost immediate and substantial effects on health outcomes followed reduced exposure to air pollution

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Pollution
Fortunately, reducing air Pollution can result in prompt and substantial health gains. Pixabay

Reductions in Air Pollution yielded fast and dramatic impacts on health-outcomes, as well as decreases in all-cause morbidity, a new study suggests.

The study, published in the journal Annals of the American Thoracic Society, reviewed interventions that have reduced air pollution at its source. It looked for outcomes and time to achieve those outcomes in several settings, finding that the improvements in health were striking.

Starting at week one of a ban on smoking in Ireland, for example, there was a 13 per cent drop in all-cause mortality, a 26 per cent reduction in ischemic heart disease, a 32 per cent reduction in stroke, and a 38 per cent reduction in chronic obstructive pulmonary disease (COPD). Interestingly, the greatest benefits in that case occurred among non-smokers.

“We knew there were benefits from pollution control, but the magnitude and relatively short time duration to accomplish them were impressive,” said lead author Dean Schraufnagel from the American Thoracic Society in the US.

“Our findings indicate almost immediate and substantial effects on health outcomes followed reduced exposure to air pollution. It’s critical that governments adopt and enforce WHO guidelines for air pollution immediately,” Schraufnagel added.

Pollution
Reductions in Air Pollution yielded fast and dramatic impacts on health-outcomes, as well as decreases in all-cause morbidity, a new study suggests. Pixabay

According to the researchers, In the US a 13-month closure of a steel mill in Utah resulted in reducing hospitalisations for pneumonia, pleurisy, bronchitis and asthma by half.

School absenteeism decreased by 40 per cent, and daily mortality fell by 16 per cent for every 100 µg/m3 PM10 (a pollutant) decrease.

Women who were pregnant during the mill closing were less likely to have premature births.

A 17-day ‘transportation strategy,’ in Atlanta, Georgia during the 1996 Olympic Games involved closing parts of the city to help athletes make it to their events on time, but also greatly decreased air pollution.

In the following four weeks, children’s visits for asthma to clinics dropped by more than 40 per cent and trips to emergency departments by 11 per cent. Hospitalizations for asthma decreased by 19 per cent.

WHO
Findings of the Study indicate almost immediate and substantial effects on health outcomes followed reduced exposure to air pollution. It’s critical that governments adopt and enforce WHO guidelines for air pollution immediately. Wikimedia Commons

Similarly, when China imposed factory and travel restrictions for the Beijing Olympics, lung function improved within two months, with fewer asthma-related physician visits and less cardiovascular mortality.

“Fortunately, reducing air pollution can result in prompt and substantial health gains. Sweeping policies affecting a whole country can reduce all-cause mortality within weeks,” Schraufnagel said.

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Local programmes, such as reducing traffic, have also promptly improved many health measures, said the study. (IANS)