[Prevalence and influential factors for asthma among adults in Chinese]

To analyze the prevalence and influential factors for asthma among adults in Chinese.
 Methods: Chinese residents aged ≥18 years in 12 regions were enrolled to estimate the prevalence of asthma in adults with different characteristics. Multivariate logistic regression analysis were adopted to determine the influential factors for asthma based on the China Health and Nutrition Survey in 2009 and 2011.
 Results: The prevalence of asthma was 1.25% (95%CI 1.06% to 1.43%) among the entire adult population in China. There were significant differences in terms of age, gender, regions, city and countryside, smoking, body mass index (BMI), education levels, marriage and subjective well-being (SWB)(all P<0.05). Compared with normal people, the risk of asthma complicated with hypertension, diabetes, myocardial infarction and stroke was significantly increased (P<0.01). The multiple logistic regression analysis showed that the influential factors for asthma included age (OR=1.042, 95%CI 1.032 to 1.053), gender (male OR=1.533, 95%CI 1.080 to 2.167), regions (Beijing OR=2.470, 95%CI 1.155 to 5.308), urban area (OR=1.355, 95%CI 1.026 to 1.786), BMI (OR=1.021, 95%CI 1.000 to 1.037), smoking (OR=1.428, 95%CI 1.028 to 1.989), drinking (OR=0.711, 95%CI 0.976), education level (OR=0.964, 95%CI 0.930 to 0.999), poor short-term health status (OR=5.295, 95%CI 4.055 to 6.934), well-being (lowest OR=2.219, 95%CI 1.272 to 3.887), playing games (OR=2.732, 95%CI 1.023 to 6.088) and watching TV (OR=1.695, 95%CI 1.036 to 2.941).
 Conclusion: Adult asthma is associated with multiple factors including age, gender, lifestyle, social environment, etc.