title: Alcohol use trajectories in two cohorts of U.S. women aged 50 to 65 at baseline.
abstract: OBJECTIVE
  To examine drinking trajectories followed by two cohorts of older women over 8 to 10 years of follow-up.
  
  
  METHODS
  Longitudinal analyses of two nationally representative cohorts using semiparametric group-based models weighted and adjusted for baseline age.
  
  
  METHODS
  Study data were obtained from detailed interviews conducted in the home or by telephone.
  
  
  METHODS
  One cohort included 5,231 women in the Health and Retirement Study (HRS) aged 50 to 65 in 1996; the other included 1,658 women in the National Longitudinal Survey (NLS) aged 50 to 65 in 1995.
  
  
  METHODS
  Both cohorts reported any recent drinking and average number of drinks per drinking day using similar but not identical questions. HRS women completed six interviews (one every other year) from 1996 to 2006. NLS women completed five interviews from 1995 to 2003.
  
  
  RESULTS
  All trajectory models yielded similar results. For HRS women, four trajectory groups were observed in the model based on drinks per day: increasing drinkers (4.9% of cohort), infrequent and nondrinkers (61.8%), consistent drinkers (25.9%), and decreasing drinkers (7.4%). Corresponding NLS values from the drinks per day model were 8.8%, 61.4%, 21.2%, and 8.6%, respectively. In 2006, the average number of drinks per day for HRS women in the increasing drinker and consistent drinker trajectories was 1.31 and 1.59, respectively. In 2003, these values for NLS women were 0.99 and 1.38, respectively.
  
  
  CONCLUSIONS
  Most women do not markedly change their drinking behavior after age 50, but some increase their alcohol use substantially, whereas others continue to exceed current recommendations. These findings underscore the importance of periodically asking older women about their drinking to assess, advise, and assist those who may be at risk for developing alcohol-related problems.
authors.affiliation: Battelle Memorial Institute, Centers for Public Health Research and Evaluation, Seattle, Washington 98109, USA. boboj@battelle.org
authors.forename: Janet Kay
authors.initials: JK
authors.lastname: Bobo
authors.forename: April A
authors.initials: AA
authors.lastname: Greek
authors.forename: Daniel H
authors.initials: DH
authors.lastname: Klepinger
authors.forename: Jerald R
authors.initials: JR
authors.lastname: Herting
mesh_terms: D000368:Aged; D000375:Aging; D000428:Alcohol Drinking / Q000453:epidemiology / Q000517:prevention & control*; D000437:Alcoholism / Q000453:epidemiology / Q000517:prevention & control*; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008016:Life Change Events; D008875:Middle Aged; D012179:Retirement; D012307:Risk Factors; D011795:Surveys and Questionnaires; D014481:United States / Q000453:epidemiology