The closer people live to a main road, the more likely they are to suffer from respiratory symptoms such as breathlessness and wheezing.
While outdoor air pollution especially tiny particles that can be breathed deep into the lungs is known to be hazardous to people’s health, to date no research has looked at how proximity to main roads affects respiratory symptoms in a general population, Health news reported.
Researchers from the University of Basel, Switzerland, looked at data from a two-part study of air pollution and lung disease.
It involved 9,651 randomly selected men and women aged 18 to 60 who enrolled in the study in 1991, 8,047 of whom re-enrolled for the second phase of the study in 2002.
People’s risk of having attacks of breathlessness increased by 13 per cent for every 500-meter segments of main street located within 200 meters of their home. The risk of such attacks among people who had never smoked fell by 12 per cent for each additional 100 meters between their homes and a main street.
It was found that individuals whose homes were within 20 meters of a busy road were 15 per cent more likely to regularly have phlegm in their breathing passages, while they were 34 per cent more likely to have wheezing with breathing problems.
The effects of traffic on respiratory health were stronger for men and for people who had never smoked. The effects of living near main streets were weaker in 2002 than in 1991, which may have been due to stricter requirements on auto emissions.
The above findings provide strong confirmation that living close to main streets or in a dense street network increases the risks for certain respiratory symptoms in adults, particularly for asthma-related symptoms such as attacks of breathlessness and wheezing and for bronchitic symptoms such as regular cough and phlegm. The News