title: Predictors of smokeless tobacco abstinence.
abstract: OBJECTIVE
  To investigate predictors of tobacco abstinence among smokeless tobacco (ST) users.
  
  
  METHODS
  Logistic regression analyses assessed characteristics associated with tobacco abstinence among ST users receiving bupropion SR.
  
  
  RESULTS
  Older age was associated with increased tobacco abstinence in both placebo and bupropion SR groups at end of treatment and one year. Abstinence was lower at one year for subjects with a history of major depression. At end-of-treatment, a 2-way interaction was detected suggesting bupropion SR may be efficacious for subjects with other household tobacco users.
  
  
  CONCLUSIONS
  Younger ST users and those with a history of depression are less likely to quit ST use.
authors.affiliation: Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN 55905, USA. ebbert.jon@mayo.edu
authors.forename: Jon O
authors.initials: JO
authors.lastname: Ebbert
authors.forename: Elbert D
authors.initials: ED
authors.lastname: Glover
authors.forename: Eri
authors.initials: E
authors.lastname: Shinozaki
authors.forename: Darrell R
authors.initials: DR
authors.lastname: Schroeder
authors.forename: Lowell C
authors.initials: LC
authors.lastname: Dale
mesh_terms: D000328:Adult; D018687:Antidepressive Agents, Second-Generation / Q000627:therapeutic use*; D016642:Bupropion / Q000627:therapeutic use*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D019966:Substance-Related Disorders / Q000453:epidemiology* / Q000517:prevention & control*; D020340:Tobacco Use Cessation / Q000706:statistics & numerical data*; D014030:Tobacco, Smokeless
chemical_list: D018687:Antidepressive Agents, Second-Generation; D016642:Bupropion