Supplementary Material for: Diagnosis and Management of Severe Asthma in Switzerland: Analysis of Survey Results Conducted with Specialists and General Practitioners

<b><i>Background:</i></b> Severe asthma commonly affects 5–10% of the asthmatic population and accounts for approximately 50% of the overall asthma costs. <b><i>Objective:</i></b> This analysis investigated how severe asthma is diagnosed, treated, and managed by specialists and general practitioners (GPs) in Switzerland. <b><i>Methods:</i></b> Two surveys, one each among specialists (<i>N</i> = 44) and GPs (<i>N</i> = 153), were conducted to understand their self-perception on diagnosis, treatment, and management of severe asthma. <b><i>Results:</i></b> Fifty-five percent of the specialists felt very confident and 43% confident in recognizing the symptoms of severe asthma and diagnosing severe asthma. In contrast, 9% of the GPs were very confident and 59% confident in diagnosing severe asthma. More specific diagnostic tests for severe asthma, like total and specific immunoglobulin E levels and measurement of the fraction of exhaled nitric oxide, were run by specialists (χ² = 171.4; df = 15, <i>p</i> &lt; 0.001). GPs and specialists were using different measurements to assess severe asthma (χ² = 385.2; df = 13, <i>p</i> &lt; 0.001) and their prescribing patterns differed significantly (χ² = 189.8; df = 10, <i>p</i> &lt; 0.001). GPs referred patients with severe asthma if the diagnosis was unclear (24%), if treatment failure occurred (26%), and if the patients were at high risk (41%). <b><i>Conclusions:</i></b> Oral corticosteroids (OCSs) are considered as background therapy for severe asthma by GPs and specialists. In order to reduce the OCS burden, there is a need to improve the awareness for other add-on therapies. A joint collaboration between GPs and specialists is the key to leverage therapeutic strategies together.