Abstract:OBJECTIVE To explore the correlative causes of bronchial asthma in Lanzhou, and to provide evidence for preventing bronchial asthma, so as to shed light on the clinic practice. METHODS It adopted group case-control method and questionnaire survey to analyze the correlative causes of bronchial asthma. The patients with or without asthma in the Respiratory Department of the Second People’s Hospital of Lanzhou were analyzed by the matched case-control study according to the age and sex. Logistic regression analysis was used to analyze the correlation of risk factors. RESULTS The results of single-factor Logistic regression analysis indicated the family history of asthma, chronic bronchitis, allergic diseases, smoking, pet raising, hair dyeing, planting had statistic influence on bronchial asthma. The results of multiple-factor Logistic regression analysis indicate age, gender, the family history of asthma, planting at home or outside had statistic influence on bronchial asthma. CONCLUSION There were a lot of risk factors which affected adult asthma in Lanzhou. The awareness of bronchial asthma and the self-regulation were low among the patients. It needed to pay attention to the health education, avoid the risk factors may be the effective method to reduce morbidity and fatality.