According to a recent study, living in the US for more than a decade raises the risk of some allergies while it has affirmed that children born outside the country are less likely to suffer from asthma, skin and food allergies.

The findings are based on the evaluation of records of over 92,000 people in the US from 2007-2008 phone surveys. The allergies reported in the study were asthma, eczema, hay fever and food allergies.

It was learnt certain environmental conditions lead to such allergies later in life triumphing over the protective effects of exposure to microbes.

The study was led by Jonathan Silverberg of St. Luke's-Roosevelt Hospital Center in New York and was published in the Journal of the American Medical Association. Silverberg avowed that the children born outside the US were found to have lower prevalence of any allergic diseases in comparison to those born in the US.

The risk was found to be 20.3% outside the US while it was found to be 34.5% in the country. Also the Americans born outside the country developed increased risk of allergic disease with prolonged residence in the United States.

"These data indicate that duration of residence in the United States is a previously unrecognized factor in the epidemiology of atopic disease", said the research.