2.2 Study design
This is a non-interventional, prospective, multi-center, observational study. Data were collected and recorded during three patient visits and one phone consultation. The first visit included on-site administration of HDM SLIT-tablet and collection of baseline characteristics. An interview by phone followed a week later. The second visit followed three months and the final visit 1 year after the initial visit, respectively. During each visit the allergic symptoms, Control of Allergic Rhinitis and Asthma Test (CARAT) questionnaire, (change in) concomitant medication, lung function measurements (only if indicated according to the treating physician) and safety evaluations (AEs/SAEs) were recorded.