The prevalence of small airway obstructive disorder was 37.8%, obstructive disorder was 27.8%, restrictive disorder was 1.1%, mixed disorder was 18.9%.
Tỷ lệ tắc nghẽn đường thở nhỏ chiếm 37,5%, rối loạn tắc nghẽn 27,8%, hạn chế 1.1%, hỗn hợp 18,9%.