Randomization and the study outcomes
DISEASE, RECRUITMENT
The study implicated meeting each patient at the time of recruitment (time zero) and after 3 months for follow-up. The enrolled participants were randomized using simple randomization into two groups; odd numbers for the control group and even numbers for the intervention group. The control group received a verbal teach-to-goal (TTG) inhaler technique education while the intervention group received a video-based TTG education.The main outcome of the study was inhaler technique mastery at follow-up (after 3 months). Secondary outcomes included amelioration of disease control, disease-related quality of life, and medication adherence at follow-up. 