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[Factors that contributed to quit smoking].

Sixteen smokers from Porto Alegre, Rio Grando do Sul, Brazil, in abstinence for more than six months were interviewed to investigate the factors that contribute for the success in quitting smoking. Interviews were examined by Content Analysis and seven categories emerged: determination to stop smoking, support received, social restrictions to smoking, benefits related to quitting smoking, information on the problems caused by smoking, elucidating campaigns, and the use of tricks. Results show that the individual's willingness to quit smoking overwhelms other factors, and that the smoker needs a lot of determination, as well as the support of society to be able to overcome the barrier of nicotine dependence.