A non-interventional study to investigate the proportion, characteristics and treatment reality of adult patients with severe and uncontrolled severe asthma using a claims database - KEIFU study

The primary analysis set consisted of 10,579 'athma patients under treatment'. 'Athma patients under treatment' included 823 'severe asthma patients'(7.8%). The number (%) of 'uncontrolled severe asthma patients' was 267 patients (2.5%), and that of 'non-severe patients' was 9,756 (92.2%). Compared to 'non-severe patients', 'uncontrolled severe asthma patients' had a higher frequency in asthma exacerbation and more expensive direct medical expenditure. Also, compared to 'non-severe patients', 'uncontrolled severe asthma patients' had a higher amount of use of systemic steroids.