Generally believed that people living in the city are more likely to suffer from asthma. But the United States, a new study questioned that there is no significant difference between urban and rural people with asthma risk faced, and poverty is an important risk factor for asthma.
Cities are more susceptible to asthma, this view appears in about 50 years ago, many experts believe that within the city pollution, cockroaches, mold and other allergens and indoor smoke increases the risk of children suffering from asthma. But recent studies have suggested that these risk factors are no longer unique to the city.
The study, published in the United States on the 20th, “Journal of Allergy and Clinical Immunology,” the survey of more than 23,000, 6-year-old to 17-year-old American children. Survey shows that 13 percent of urban children with asthma, 11 percent of rural children suffer from asthma. After considering the factors of race, ethnicity and geographic location, the researchers found that urban children and rural children suffer from asthma, in fact, there is no significant difference between the odds.
Further analysis showed that children in family income below the poverty line are more likely to suffer from asthma, and the lower the family income, the higher the children suffering from asthma risk. In addition, African Americans seem to be more susceptible to asthma, the survey this proportion reached 17%, while whites, Hispanics and Asians suffering from asthma rates were only 10%, 9% and 8%.
The researchers explained that secondhand smoke is an important risk factor for childhood asthma cause, and higher smoking rates in low-income families. In addition, the pressure of life for low-income families are often large, long-term psychological burden will weaken the human immune system.