Chen W, et al. - Researchers analyzed the long-term trajectories of mild asthma in patients, 14 to 45 years of age, from the administrative health data of British Columbia, Canada. They also assessed the impacts of early-stage risk factors on the subsequent disease course. For each follow-up year, a patient’s asthma severity was divided into mild/dormant, moderate, or severe based on the intensity of asthma medications and occurrence of exacerbations. Ordinal logistic regression was also used. A largely stable course of mild asthma was reported over time. However, potentially modifiable factors such as inappropriate use of rescue medications were found to be related to a worsened prognosis.