A new diagnosis of asthma or COPD is linked to smoking cessation - the Tromsø study.

Background: Patients with COPD have had a lower tendency to quit smoking compared to patients with coronary heart disease (CHD). We wanted to investigate if this is still true in a Norwegian population.

Methods: Our data came from the fifth and sixth Tromsø surveys, which took place in 2001-2002 and 2007-2008.