Theoretical questionnaire
Regarding the theoretical questionnaire, 68 subjects (81%) answered that IT varies according to the patients’ age. Only 20 of the participants (23.8%) answered correctly to the question “at what age does inhaler technique vary?”. With respect to IT in children over 7 years old, only 13 (15.5%) answered how to perform IT correctly. The theoretical questionnaire and the correct answers are provided as Supplementary material.