NEW YORK, Oct 20: A smog-filled sky can make it hard to breathe, but air pollution in the home may also be hard on people with lung disease, researchers have found.

In a study of 148 adults with chronic obstructive pulmonary disease (COPD), investigators found that those who lived in homes with poor air quality tended to have worse symptoms.

Cigarette smoke was the major air-polluting culprit.

“The importance of knowing this for people with COPD and their families is that indoor smoking is under our control,” lead study author Dr Liesl M. Osman said.

“We can immediately very much improve air quality by stopping smoking in the home,” said Osman, a senior research fellow at the University of Aberdeen in Scotland.

COPD includes emphysema and chronic bronchitis, two serious lung diseases frequently caused by smoking. Breathing in other irritants, such as polluted outdoor air, can contribute to or exacerbate COPD, but less is known about the importance of household air pollution.

To investigate, Osman’s team measured air quality in the homes of 148 Scottish adults with severe COPD. They also questioned them about their respiratory symptoms and smoking habits.

Thirty-nine per cent of the subjects were smokers and 49 per cent lived in a household where someone smoked.—Reuters