“…The study which was conducted in São Paulo showed, after the analysis was adjusted, that the following factors independently were associated with COPD: smoking, becoming tired very easily, being over the age of 60, health problems in the last 15 days and a lack of physical activity in their free time 14 . However, the study that was referred to, covered self-diagnosed COPD which represents an important limitation for the condition which is not well known by the general population 5,15 . Some authors highlight that even amongst health care professionals COPD is not well known.…”