Smoking cessation is the mainstay of treatment for chronic obstructive pulmonary disease(COPD) and prevention of related malignancy. But smoking cessation cliniss generally have low success rates. The aim of this study is to evaluate the abstinece rates and factors determining success among during out patient(OPD) run by pulmonologist(smoking cessation specialist).

125 smokers with COPD(97) and bronchal asthma(28) were consulted in the smoking cessation clinic during treatment of out patients department from 2003 to 2005.

Patients palnned to cisit every 4 weeks and the patients were ercerived brief intervenrion(5-10 minutes) by a same pulmonologist(smoking cesation specialist) every 4weeks. Medication was evaluated every 4 weeks and followed-up for 6 months.

Overall, 33%(41/125) of patients were absinent at 6 months. Success rate was higher among the older(mean age of 54.0 vs. 45.6, p=0.00). Logistic regression was to identify predictors of abstinence at the end of the medication phase.

Mulivariate predictors of abstinence were the following : older age(p<0.00), numbers of visit to OPD[OR=1.85(95% CI : 1.21-2.86)], duration of medication [OR=18.3(95% CI : 1.54-217.00)], doctor's recommendation[OR=16.62(95%CI : 1.29-214.17)].

Brief, frequent and intensive motivational intervention with medication(bupropion) during OPD by specialist was effective for cessation smoking in view of time and cost for smokers with COPD and bronchial asthma who require quitting of smoking inevitably for treatmint and prevention of diease.