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Reduction in asthma incidences and mortality, as well as improved quality of life, can be achieved via a wide use of prevention methods. A number of randomized cohort studies demonstrated the effectiveness of such management and the need for multiple treatments. Here, we evaluate whether asthma awareness influences the lifestyle and the use of prevention, as well as the effects of age, sex, economic status, and education on the use of prophylaxis. A total of 18,617 (53.8% female; 24.2% 6-7 years old, 25.4% 13-14 years old, and 50.4% 20-44 years old) were selected by a stratified cluster sampling method in eight cities and one rural area, each over 150,000 citizens. The sample was selected based on the methods and questionnaires of International Study of Asthma and Allergies in Childhood and European Community Respiratory Health Survey. Patients aware of asthma significantly less often (p < 0.05) reported owning asthma-inducing items and significantly more often reported behaviors minimizing the number of allergens (p < 0.05). Patients aware of asthma took all actions reducing their exposure to in-house allergens significantly more often than the healthy (p < 0.05) and individuals with symptoms only (p < 0.05). Allergy prevention was used more often in children (p < 0.0005), responders aware of diseases (p < 0.05), higher levels of education (p < 0.05), and higher household income (p < 0.05). The most common type of prophylaxis used is prophylactic actions, which are undertaken by patients diagnosed with asthma and who are aware of their disease. Adults do not use preventive measures as often as children or adolescents do. Higher rates of prevention-oriented behavior were observed in groups characterized by higher levels of education and higher household income. [ABSTRACT FROM AUTHOR]