[Success of smoking cessation in patients with chronic obstructive pulmonary disease]

Smoking causes chronic obstructive pulmonary disease (COPD) in 15 to 20% of smokers. Smoking accelerates the annual rate of FEV(1) decline, whereas it was demonstrated that smoking cessation is the major factor that reduces this decline. The aims of this prospective study were to assess the success rate and factors affecting smoking cessation, besides, to evaluate the effect of cessation on annual FEV(1) decline. Sixty-five consecutive patients with COPD and as a control group 50 ageand sex-matched healthy smokers who were admitted to our smoking cessation clinic were enrolled in the study. Intensive behavioral therapy alone or with nicotine replacement therapy or bupropion HCL was given to both groups and success rate of smoking cessation after one year was assessed. It was shown that demographic features of the subjects and the history of COPD had no effect on success of smoking cessation. At the end of one year the rate of smoking cessation was 29% in patients with COPD and 49% in the control group (p< 0.05). All different therapy interventions had similar effects on smoking cessation. The annual FEV(1) values increased 29 mL in quitters and decreased 25 mL in patients continuing smoking (p> 0.05). In this study, we concluded that the success of smoking cessation in COPD patients admitted to the smoking cessation clinic was significantly lower than healthy smokers and annual FEV(1) decline was decreased in quitters.