This is a multicentre, open-label, randomized clinical trial. Study subjects are active smokers older than 40 years of age with a more than 10 pack-year history who have not been diagnosed with COPD, ...

Please provide your email address to receive an email when new articles are posted on . Preserved ratio impaired spirometry is a common lung function trait associated with breathlessness, ...

In routine clinical practice, a COPD diagnosis is often based on a single initial spirometry test, and none of the above COPD guidelines recommend repeat spirometry testing when making the diagnosis ...