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Published in: Clinical and Translational Allergy 1/2011

Open Access 01-12-2011 | Research

Allergic rhinitis in northern vietnam: increased risk of urban living according to a large population survey

Authors: Hoàng Thị Lâm, Nguyễn Văn Tường, Linda Ekerljung, Eva Rönmark, Bo Lundbäck

Published in: Clinical and Translational Allergy | Issue 1/2011

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Abstract

Background

Little is known about prevalence and risk factors of allergic rhinitis and chronic nasal 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 < 0.001). Allergic rhinitis ever and chronic nasal symptoms were both significantly associated with asthma and respiratory symptoms, respectively (p < 0.001). Exposure to gas, dust or fumes at work was significantly associated with allergic rhinitis ever, OR 1.57 (95% CI 1.34 - 1.84), nasal blocking, OR 1.90 (95% CI 1.68 - 2.15) and runny nose, OR 1.32 (95% CI 1.17 - 1.49), while somewhat surprisingly no association with smoking was found. Female sex was a significant risk factor for both nasal blocking and runny nose.

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, exposure to air pollution at work was significantly associated with allergic rhinitis ever, nasal blocking and runny nose.
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Metadata
Title
Allergic rhinitis in northern vietnam: increased risk of urban living according to a large population survey
Authors
Hoàng Thị Lâm
Nguyễn Văn Tường
Linda Ekerljung
Eva Rönmark
Bo Lundbäck
Publication date
01-12-2011
Publisher
BioMed Central
Published in
Clinical and Translational Allergy / Issue 1/2011
Electronic ISSN: 2045-7022
DOI
https://doi.org/10.1186/2045-7022-1-7

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