Abstract Background Little is known about prevalence and risk factors of allergic rhinitis and chronic nasal Front Loader Door Catch symptoms among adults in Vietnam.We aimed to estimate the prevalence, risk factor patterns and co-morbidities of allergic rhinitis and chronic nasal symptoms in one urban and one rural area in northern Vietnam.Methods A cross-sectional questionnaire survey was conducted from August 2007 to January 2008 in urban Hoankiem and rural Bavi in Hanoi among adults aged 21-70 years.
Of 7008 randomly selected subjects, 91.7% participated in Bavi and 70.3% in Hoankiem.
Results Allergic rhinitis ever or chronic nasal symptoms were reported by 50.2%.The prevalence of allergic rhinitis ever was considerably higher in Hoankiem compared to Bavi, 29.
6% vs 10.0% (p Conclusions Allergic rhinitis ever was considerably more common in the urban area.Nasal blocking and runny nose was each reported by about one third of the studied sample with no major urban-rural difference.
Further, Lego Boxed exposure to air pollution at work was significantly associated with allergic rhinitis ever, nasal blocking and runny nose.