Does living with smokers make quitting cigarettes more difficult?

To test the assumptions that living with smokers and having housemates with low interest in one's stopping smoking would make quitting cigarettes difficult, successful stoppers were compared with non-stoppers for housemates ' smoking and attitudes. Subjects were 147 people who attended several American Cancer Society Stop Smoking Clinics. Chances of stopping smoking were not enhanced by living either with non-smokers or with people believed to have high interest in one's stopping regardless of how close their relationship was. Giving up a smoking addiction seems to require inner motivation from the smoker, with external cues for smoking and support having minimal influence in a clinic stopping process.