Honkamäki J, et al. - In this large population-based study with gender-specific analyzes, researchers assessed the incidence of asthma diagnosis at various ages and differences between child- and adult-diagnosed asthma. Participants were 4173 (52.3%) of 8000 randomly selected subjects aged 20–69 years in western Finland, who responded to a respiratory questionnaire. Adult-diagnosed asthma was reported by 63.7% of subjects, 58.4% of men and 67.8% of women in a population of asthmatics. In 10-year age groups, incidence of asthma diagnosis was calculated, with a peak noted in young boys (0–9 years) and middle-aged women (40–49 years), and between 1946 and 2015, 2.2/1000/year was the average incidence rate. In men and women with asthma, the dominant phenotype by age of 50 years and 38 years, respectively, was adult-diagnosed asthma. Based on the findings, they recommended considering asthma diagnosed in adulthood more in clinical practice and management guidelines.