title: Use of E-Cigarettes Among Current Smokers: Associations Among Reasons for Use, Quit Intentions, and Current Tobacco Use.
abstract: BACKGROUND
  Research has documented growing availability and use of e-cigarettes in the United States over the last decade.
  
  
  METHODS
  We conducted a national panel survey of current adult cigarette smokers to assess attitudes, beliefs, and behaviors relating to e-cigarette use in the United States (N = 2,254).
  
  
  RESULTS
  Among current cigarette smokers, 20.4% reported current use of e-cigarettes on some days and 3.7% reported daily use. Reported reasons for e-cigarette use included: quit smoking (58.4%), reduce smoking (57.9%), and reduce health risks (51.9%). No significant differences in sociodemographic characteristics between e-cigarette users and nonusers were observed. Prior quit attempts were reported more frequently among e-cigarette users (82.8%) than nonusers (74.0%). Intention to quit was reported more frequently among e-cigarette users (64.7%) than nonusers (46.8%). Smokers intending to quit were more likely to be e-cigarette users than those not intending to quit (odds ratio [OR] = 1.90, CI =1.36-2.65). Those who used e-cigarettes to try to quit smoking (OR = 2.25, CI = 1.25-4.05), reduce stress (OR = 3.66, CI = 1.11-12.09), or because they cost less (OR = 3.42, CI = 1.64-7.13) were more likely to report decreases in cigarette smoking than those who did not indicate these reasons. Smokers who reported using e-cigarettes to quit smoking (OR = 16.25, CI = 8.32-31.74) or reduce stress (OR = 4.30, CI = 1.32-14.09) were significantly more likely to report an intention to quit than those who did not indicate those reasons for using e-cigarettes.
  
  
  CONCLUSIONS
  Nearly a quarter of smokers in our study reported e-cigarettes use, primarily motivated by intentions to quit or reduce smoking. These findings identify a clinical and public health opportunity to re-engage smokers in cessation efforts.
authors.affiliation: Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN; rutten.lila@mayo.edu.
authors.forename: Lila J Finney
authors.initials: LJ
authors.lastname: Rutten
authors.affiliation: Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, MD;
authors.forename: Kelly D
authors.initials: KD
authors.lastname: Blake
authors.affiliation: Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN;
authors.forename: Amenah A
authors.initials: AA
authors.lastname: Agunwamba
authors.affiliation: Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, MD;
authors.forename: Rachel A
authors.initials: RA
authors.lastname: Grana
authors.affiliation: Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN;
authors.forename: Patrick M
authors.initials: PM
authors.lastname: Wilson
authors.affiliation: Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN;
authors.forename: Jon O
authors.initials: JO
authors.lastname: Ebbert
authors.affiliation: Health Sciences Research Mayo Clinic, Scottsdale, AZ.
authors.forename: Janet
authors.initials: J
authors.lastname: Okamoto
authors.affiliation: Health Sciences Research Mayo Clinic, Scottsdale, AZ.
authors.forename: Scott J
authors.initials: SJ
authors.lastname: Leischow
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D066300:Electronic Nicotine Delivery Systems / Q000523:psychology / Q000706:statistics & numerical data*; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D033182:Intention; D008297:Male; D008875:Middle Aged; D009042:Motivation; D016017:Odds Ratio; D012907:Smoking / Q000453:epidemiology / Q000523:psychology; D016540:Smoking Cessation / Q000379:methods / Q000523:psychology* / Q000706:statistics & numerical data; D000074606:Smoking Prevention; D012959:Socioeconomic Factors; D014029:Tobacco Use Disorder / Q000453:epidemiology / Q000523:psychology / Q000534:rehabilitation; D014481:United States / Q000453:epidemiology; D055815:Young Adult