title: [Study on the related factors of smoking behavior transition at different stages among undergraduate students].
abstract: OBJECTIVE
  To explore the influencing factors of smoking behavior transition at different stage of smoking among undergraduate students.
  
  
  METHODS
  8138 undergraduate students from grade 1 to 3 were selected using cluster sampling method from an university in Guangzhou with their smoking behaviors and relevant factors studied through a self-administered questionnaire. Beginners, un-regular smokers and regular smokers were defined as "case group", while non-smokers, beginners and un-regular smokers were defined as "control group" accordingly. Three multivariable logistic regressions were separately conducted to explore the influencing factors of behavioral transition at different stage of smoking.
  
  
  RESULTS
  Of the 8138 students investigated, the prevalence rates of beginners, un-regular smokers and regular smokers were 19.6%, 2.0% and 1.1%, respectively; while all of the above said three rates increased with grades of the students. Some students might still try to smoke or become regular smoker in the university. In male undergraduate students, determinants for the transition from non-smokers to s mokers were: source of students, father' s educational level, smoking-related knowledge and belief, and smoking habit of the roommates. Risks that influencing the transition from beginners to un-regular smokers were: being non-medical students,smoking-related belief, roommates and classmates who were smokers and transition from un-regular smokers to regular smokers would include father' s educational level and average income of family. In female undergraduate students,influencing factors from non-smokers to beginners were mother's educational level, smoking-related belief, and roommates smokers, while father's educational level, roommates and classmates' smoking habits were significant associated with beginners' change to un-regular smokers.
  
  
  CONCLUSIONS
  The influencing factors related to the transition of different stage on smoking would be different in undergraduate students,and some specific measures should be taken based on the different stage of smoking.
authors: Department of Biostatistics and Epidemiology, School of Public Health, Sun Yat-Sen University, Guangzhou, China.
authors: Min-yan
authors: MY
authors: Han
authors: Wei-qing
authors: WQ
authors: Chen
authors: Ci-yong
authors: CY
authors: Lu
authors: Cai-xia
authors: CX
authors: Zhang
authors: Yi-juan
authors: YJ
authors: Luo
authors: Xue-qing
authors: XQ
authors: Deng
authors: Wen-Hua
authors: WH
authors: Ling