Objective To understand the prevalence of adult smoking in Xi'an City and the attitude of banning smoking in indoor public places, and to provide support for tobacco control legislation. Methods A multi-staged cluster sampling design which based on the principles of global adult tobacco survey was used in the survey to select 2400 inhabitant from districts of urban Xi'an. Data were collected through household survey by using electronic devices. Data were weighted and analyzed by SAS 9. 2 and SUDAAN 10. 0. 1...