Fig. 3: The exacerbation rate in three phenotypes in both cohorts.
From: Data-driven questionnaire-based cluster analysis of asthma in Swedish adults

a The mean rate of exacerbation (%) defined as the number of asthma-related emergency visits due to asthma in the last 12 months. b The mean rate of exacerbation (%) defined as the usage of oral corticosteroids as prednisolone and betamethasone.