Simple advice has a small effect on cessation rates. Assuming an unassisted quit rate of 2 to 3%, a brief advice intervention can increase quitting by a further 1 to 3%. Additional components appear to have only a small effect, though there is a small additional benefit of more intensive interventions compared to very brief interventions.
Smoking cessation in patients with COPD in daily general practice (SMOCC): six months' results.
Chronic Obstructive Pulmonary Disease (COPD) forms an increasing health problem. Despite smoking cessation improving the prognosis of the disease, many patients persist smoking. The present study presents the results of a smoking cessation counseling protocol in general practice (Smoking Cessation in patients with COPD in general practice (SMOCC)).
                A randomized controlled trial of patients with COPD compared smoking cessation counseling according to an intensified minimal intervention strategy with usual care. In total 43 general practices with 392 patients participated in Nijmegen, The Netherlands, in 2001-2002.
                Significantly more smokers in the experimental group made a quit attempt (44.9% versus 36.5%) and actually quit smoking than in the control group (16.0% versus 8.8%). The motivation to stop smoking at baseline was not associated with smoking cessation.
                The SMOCC strategy doubled the self-reported quit rates and was complied well by the general practitioners. Implementation in general practice is recommended.