Objective To investigate the prevalence rate of childhood asthma in 2010 in urban Baotou, China, as well as the characteristics of attacks and the status of diagnosis and treatment of childhood asthma. Methods More than 10 000 children (0-14 years) were selected from 3 secondary schools, 3 primary schools, 6 kindergartens, and 4 community vaccination sites in urban Baotou by cluster random sampling between September 2009 and August 2010. A standardized preliminary questionnaire was used for screening out suspected cases, which were then confirmed or excluded by a clinician; the confirmed cases underwent further questionnaire survey. Double entry and validation was adopted for all data using Epi-Info software, and analysis was performed using SPSS 13.0. Results A total of 11 323 children were surveyed. Asthma was diagnosed in 127 cases (including 121 children with typical asthma and 6 children with cough variant asthma), with a prevalence rate of 1.12%. The prevalence rate of asthma in male children was significantly higher than that in female children (1.51% vs 0.72%; P<0.01). The prevalence rate of asthma in 2010 was significantly increased compared with that in 1990 (0.55%) and 2000 (0.88%) (P<0.05). Systemic glucocorticoid use decreased significantly from 60.2% in 2000 to 25.9% in 2010 (P<0.01); inhaled corticosteroid use increased significantly from 13.6% in 2000 to 85.8% in 2010 (P<0.01); antibiotic use decreased from 98.1% in 2000 to 66.9% in 2010 (P<0.01). The multivariate logistic regression analysis showed that family history of allergy, allergic rhinitis, chronic cough, and recurrent respiratory tract infection were independent risk factors for childhood asthma. Conclusions The prevalence rate of childhood asthma in urban Baotou shows an increasing trend. Inhaled corticosteroids have been widely used.
Key words
Asthma /
Prevalence rate /
Epidemiology /
Risk factor /
Child
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