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Fig. 1 | BMC Pulmonary Medicine

Fig. 1

From: Risk factors for severe adult-onset asthma: a multi-factor approach

Fig. 1

Flowchart of the study population. Asthmatic patients drawn from the Finnish Drug Reimbursement register were over 30 years old. A total of 248 asthmatic patients were included in the longitudinal, population-based Mini Finland Health Survey. A total of 1400 asthmatic patients had recently (within 2 years) been diagnosed with asthma. Asthma was defined as adult onset if the subject responded that the onset of asthma symptoms and/or the age of asthma diagnosis was age 16 years or later

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