Smokers try to quit smoking and the effective aids for smoking cessation should be utilized based on the status of smoking and smoking related factors. The purpose of this survey was to assess the factors to impact on smoking cessation. The online questionnaire survey was conducted through e-mail for 8 days from March 16, 2005 with aid of the INR (Internet & Research), Korea, a specialized survey firm. The target subjects were selected for those who had have experiences to stop smoking. The questionnaire responses were analyzed from 573 subjects out of 1078 responders. As results, subjects with the shorter period of smoking and the lower dependency of nicotine had the longer period of smoking cessation (p＜0.0001). But, there was no relationship with specific smoking motivation types. The reasons of failure to stop smoking were high in withdrawal symptoms or strong smoking desire. Among the methods to stop smoking, two-thirds of responders (75.6%) tried smoking cessation with their own intention without a specific method. The highest use of aid to stop smoking was nicotine substitute therapy (38.5%), followed by cigarette alternatives (28.6%). The recommendation from friends and family (58%) was the highest reason to choose the methods to stop smoking. In conclusion, it was desirable for smokers with high dependency on nicotine to use the method reducing withdrawal symptoms or smoking desire. The smokers with low dependency on nicotine may use the cigarette alternatives under exposure to smoking environment. The smoking related factors should be considered to select a smoking cessation method for an individual smoker. (Cancer Prev Res 10, 18-28, 2005)

Keywords: Smoking cessation, Nicotine, Cigarette alternatives, Dependency, Withdrawal syndrome