title: The Relationship between Body Mass Index and Post-Cessation Weight Gain in the Year after Quitting Smoking: A Cross-Sectional Study.
abstract: BACKGROUND
  There is wide variability in the amount of weight gained when quitting smoking, but little is known about key predictors of weight gain. We examined the impact of body mass index (BMI) category and sociodemographic variables on post-cessation weight gain.
  
  
  METHODS
  We utilized National Health and Nutrition Examination Survey data from five consecutive cycles of data collection from 2003-2004 to 2011-2012 to estimate post-cessation weight gain by BMI category among recent quitters (n = 654). We analyzed data on their "current weight" and their "past year weight". We also compared the recent quitters with current smokers, in order to estimate the amount of weight that could be attributed to quitting smoking.
  
  
  RESULTS
  Recent quitters gained 1.4 kg (95% CI: 0.8 to 2.0), while current smokers had a non-significant weight change (-0.01 kg (95% CI: -0.3 to 0.2). Weight gain was significant for those in the normal weight (3.1 kg, 95% CI: 2.3 to 3.9) and overweight BMI categories (2.2 kg, 95% CI: 1.1 to 3.2).
  
  
  CONCLUSIONS
  BMI category is a key factor in the extent of post-cessation weight gain, with normal and overweight recent quitters gaining significant amounts of weight.
authors.affiliation: Center for Population Sciences, Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, Tennessee United States of America.
authors.forename: Rebecca A
authors.initials: RA
authors.lastname: Krukowski
authors.affiliation: Center for Population Sciences, Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, Tennessee United States of America.
authors.forename: Zoran
authors.initials: Z
authors.lastname: Bursac
authors.affiliation: Center for Population Sciences, Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, Tennessee United States of America.
authors.forename: Melissa A
authors.initials: MA
authors.lastname: Little
authors.affiliation: Center for Population Sciences, Department of Preventive Medicine, University of Tennessee Health Science Center, Memphis, Tennessee United States of America.
authors.forename: Robert C
authors.initials: RC
authors.lastname: Klesges
mesh_terms: D000328:Adult; D015992:Body Mass Index; D001835:Body Weight / Q000502:physiology*; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008875:Middle Aged; D009749:Nutrition Surveys; D050177:Overweight / Q000503:physiopathology*; D011237:Predictive Value of Tests; D012907:Smoking / Q000503:physiopathology*; D016540:Smoking Cessation; D015430:Weight Gain / Q000502:physiology*