Surveys on the Prevalence of Pediatric Bronchial Asthma in Japan: A Comparison between the 1982, 1992, and 2002 Surveys Conducted in the Same Region Using the Same Methodology

Abstract

BA prevalence in the third survey increased 2.1 and 1.4 times respectively compared to the first survey and second survey, indicating an upward trend in all regions and age groups surveyed.