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[Allergic rhinitis epidemiology in Japan]
Akihiko Nakamura1, Tadao Asai, Kazuhiro Yoshida
1Department of Otorhinolaryngology Brochoesophagology, Dokkyo University School of Medicine, Tochigi.
Nihon Jibiinkoka Gakkai Kaiho
|April 27, 2002
Summary
This nationwide survey found that cedar pollinosis affects 17.3% of Japanese individuals, with higher rates on the Pacific side. Perennial allergic rhinitis affects 19.8%, showing no geographic variation.
Area of Science:
- Epidemiology
- Otorhinolaryngology
- Allergology
Context:
- Allergic rhinitis is a prevalent condition with significant public health implications.
- Understanding the geographic and demographic variations in allergic rhinitis morbidity is crucial for targeted interventions.
- Previous studies in Japan have provided insights, but a comprehensive nationwide survey with high response rates was needed.
Purpose:
- To conduct a nationwide epidemiological survey of allergic rhinitis in Japan.
- To determine the morbidity rates of cedar pollinosis and perennial allergic rhinitis.
- To investigate the influence of geographic location, age, and housing environment on allergic rhinitis prevalence.
Summary:
- A nationwide survey of 17,301 subjects (otorhinolaryngologists and their families) in Japan revealed a 17.3% morbidity rate for cedar pollinosis, concentrated on the Pacific side and in central districts, with peak prevalence in teenagers.
- Pollinosis from other causes affected 11.7% and showed similar patterns to cedar pollinosis.
- Perennial allergic rhinitis affected 19.8%, with higher prevalence in younger children and no significant geographic or housing-related variations, unlike seasonal allergies.
Impact:
- This study provides valuable epidemiological data on allergic rhinitis in Japan, highlighting distinct patterns for seasonal (cedar) and perennial forms.
- The findings underscore the importance of geographic factors in cedar pollinosis, suggesting regional differences in pollen dissemination and exposure.
- The high response rate and reliability of this survey make it a significant resource for future research and public health strategies concerning allergic rhinitis management in Japan.