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ICD Code: 493. Asthma



ICD Code: 493. Article Review
Title: Fukutomi Y et al; "Nationwide Cross-Sectional Population-Based Study on the Prevalences of Asthma and Asthma Symptoms Among Japanese Adults." International Archives of Allergy and Immunology; V.153; 2010; p280     DOI:10.1159/000314369
      STUDY DESIGN: To determine the prevalences of asthma and asthma symptoms among Japanese adults, the authors conducted a nationwide cross-sectional study on the prevalences of asthma and asthma symptoms using a standardized questionnaire. A population-based cross-sectional study was conducted on subjects aged 20-79 years, covering ten different areas in Japan. Areas spread throughout the country were randomly selected and included both urban and suburban areas. This study was conducted from July to October in 2006, except for Mitake town (Gifu), which was conducted from January to February in 2007. To evaluate asthma symptoms, the same questions were asked as in the European Community Respiratory Health Survey (ECRHS).
      The subjects who are defined as having current asthma are those who have both been diagnosed with asthma by a physician and have shown an active symptom in the last 12 months. Patients who had symptoms in the past and have remitted were not included. A total of 23,483 participants were included in the analysis. The overall response rate was 70.6%.
      PREVALENCE (JAPAN): To explore the associations of age and gender with the prevalences of wheeze and current asthma, gender- and age-group-specific prevalences were calculated. The prevalence of current asthma was reported as follows in males versus females: ages 20-29, 5.5% vs 4.3%; ages 30-39, 4.9% vs 6.4%; ages 40-49, 4.3% vs 4.4%; ages 50-59, 2.3% vs 3.5%; ages 60-69, 3.4% vs 3.6%; ages 70-79, 5.2% vs 4.0%. The prevalence of current wheeze was reported as follows in males versus females: ages 20-29, 10.0% vs 8.1%; ages 30-39, 9.8% vs 9.6%; ages 40-49, 8.7% vs 8.5%; ages 50-59, 10.5% vs 8.7%; ages 60-69, 13.0% vs 9.6%; ages 70-79, 15.7% vs 9.4%. In the age groups of 30-39 and 50-59 years, the prevalence of current asthma was significantly higher among females than among males. In the other age groups, no significant difference was observed in the prevalence of current asthma between genders.
      DISCUSSION: This cross-sectional study using the Japanese version of the ECRHS questionnaire revealed that the prevalences of wheeze and current asthma among Japanese adults aged 20-79 years were 10.1% and 4.2%, and standardized prevalences among young adults aged 20-44 years were 9.3% and 5.3%, respectively. While the prevalences were lower than those in Western countries, asthma was found to be also relatively common in Japan.

Search Criteria: Text - International Archives of Allergy and Immunology; V.153; 2010; p280