摘要
The global prevalence of asthma ranges from 1% to 18% of the population in different countries. In China, while national data of asthma prevalence are still lacking, an epidemiological study in Beijing showed that the prevalence of asthma in occupational populations was 1.25%. Based on epidemiological data reported in different regions, it is estimated that 15-20 million people suffer from asthma in the mainland of China,^4 and its prevalence continues to rise. A national epidemiological study of childhood asthma in the year of 2000 showed that the prevalence of asthma in urban children under the age of 14 years was 0.12%-3.34% in different regions,
The global prevalence of asthma ranges from 1% to 18% of the population in different countries. In China, while national data of asthma prevalence are still lacking, an epidemiological study in Beijing showed that the prevalence of asthma in occupational populations was 1.25%. Based on epidemiological data reported in different regions, it is estimated that 15-20 million people suffer from asthma in the mainland of China,^4 and its prevalence continues to rise. A national epidemiological study of childhood asthma in the year of 2000 showed that the prevalence of asthma in urban children under the age of 14 years was 0.12%-3.34% in different regions,
