BACKGROUND: Alcohol-related blackouts (ARBs) are reported by ~50% of drinkers. While much is known about the prevalence of ARBs in young adults and their cross-sectional correlates, there are few prospective studies regarding their trajectories over time during mid-adolescence. This paper reports latent trajectory classes of ARBs between age 15 and 19, along with predictors of those patterns. METHODS: Latent class growth analysis (LCGA) was used to evaluate the pattern of occurrence of ARBs across 4 time points for 1,402 drinking adolescents from the Avon Longitudinal Study of Parents and Children (ALSPAC). Multinomial regression analyses evaluated age-15 demography, substance-related items, externalizing characteristics, and estimated peer substance use as predictors of latent class membership. RESULTS: ARBs were reported at age 15 in 30% and at age 19 in 74% of these subjects. Four latent trajectory classes were identified: Class 1 (5.1%) reported no blackouts; for Class 2 (29.5%), ARBs rapidly increased with age; for Class 3 (44.9%), blackouts slowly increased; and for Class 4 (20.5%), ARBs were consistently reported. Using Class 2 (rapid increasers) as the reference, predictors of class membership included female sex, higher drinking quantities, smoking, externalizing characteristics, and estimated peer substance involvement (pseudo R(2) = 0.22). CONCLUSIONS: ARBs were common and repetitive in these young subjects, and predictors of their trajectories over time involved multiple domains representing diverse characteristics.
BACKGROUND: Alcohol-related blackouts (ARBs) are reported by ~50% of drinkers. While much is known about the prevalence of ARBs in young adults and their cross-sectional correlates, there are few prospective studies regarding their trajectories over time during mid-adolescence. This paper reports latent trajectory classes of ARBs between age 15 and 19, along with predictors of those patterns. METHODS: Latent class growth analysis (LCGA) was used to evaluate the pattern of occurrence of ARBs across 4 time points for 1,402 drinking adolescents from the Avon Longitudinal Study of Parents and Children (ALSPAC). Multinomial regression analyses evaluated age-15 demography, substance-related items, externalizing characteristics, and estimated peer substance use as predictors of latent class membership. RESULTS: ARBs were reported at age 15 in 30% and at age 19 in 74% of these subjects. Four latent trajectory classes were identified: Class 1 (5.1%) reported no blackouts; for Class 2 (29.5%), ARBs rapidly increased with age; for Class 3 (44.9%), blackouts slowly increased; and for Class 4 (20.5%), ARBs were consistently reported. Using Class 2 (rapid increasers) as the reference, predictors of class membership included female sex, higher drinking quantities, smoking, externalizing characteristics, and estimated peer substance involvement (pseudo R(2) = 0.22). CONCLUSIONS: ARBs were common and repetitive in these young subjects, and predictors of their trajectories over time involved multiple domains representing diverse characteristics.
Authors: Marc A Schuckit; Tom L Smith; George P Danko; Kathleen K Bucholz; Arpana Agrawal; Danielle M Dick; John I Nurnberger; John Kramer; Michie Hesselbrock; Gretchen Saunders; Victor Hesselbrock Journal: J Stud Alcohol Drugs Date: 2014-01 Impact factor: 2.582
Authors: Jon Heron; Barbara Maughan; Danielle M Dick; Kenneth S Kendler; Glyn Lewis; John Macleod; Marcus Munafò; Matthew Hickman Journal: Drug Alcohol Depend Date: 2013-06-17 Impact factor: 4.492
Authors: Marc A Schuckit; Tom L Smith; Jon Heron; Matthew Hickman; John Macleod; Glyn Lewis; John M Davis; Joseph R Hibbeln; Sandra Brown; Luisa Zuccolo; Laura L Miller; George Davey-Smith Journal: Alcohol Clin Exp Res Date: 2011-07-18 Impact factor: 3.455
Authors: Abigail Fraser; Corrie Macdonald-Wallis; Kate Tilling; Andy Boyd; Jean Golding; George Davey Smith; John Henderson; John Macleod; Lynn Molloy; Andy Ness; Susan Ring; Scott M Nelson; Debbie A Lawlor Journal: Int J Epidemiol Date: 2012-04-16 Impact factor: 7.196
Authors: Andy Boyd; Jean Golding; John Macleod; Debbie A Lawlor; Abigail Fraser; John Henderson; Lynn Molloy; Andy Ness; Susan Ring; George Davey Smith Journal: Int J Epidemiol Date: 2012-04-16 Impact factor: 7.196
Authors: Jennifer E Merrill; Hayley Treloar; Anne C Fernandez; Mollie A Monnig; Kristina M Jackson; Nancy P Barnett Journal: Psychol Addict Behav Date: 2016-10-13
Authors: Samuel F Acuff; Andrew T Voss; Ashley A Dennhardt; Brian Borsari; Matthew P Martens; James G Murphy Journal: Alcohol Clin Exp Res Date: 2019-04-11 Impact factor: 3.455
Authors: Erin E Bonar; Jason E Goldstick; Rebecca M Cunningham; Anne C Fernandez; Alan K Davis; Mark A Ilgen; Maureen A Walton Journal: Alcohol Alcohol Date: 2019-07-01 Impact factor: 2.826