title: Heavy episodic drinking and deliberate self-harm in young people: a longitudinal cohort study.
abstract: OBJECTIVE
  To assess the association between heavy episodic drinking (HED) and deliberate self-harm (DSH) in young people in Norway.
  
  
  METHODS
  We analysed data on past-year HED and DSH from the second (1994) and third (1999) waves of the Young in Norway Longitudinal Study (cumulative response rate: 68.1%, n = 2647). Associations between HED and DSH were obtained as odds ratios and population-attributable fractions (PAF) applying fixed-effects modelling, which eliminates the effects of time-invariant confounders.
  
  
  RESULTS
  An increase in HED was associated with an increase in risk of DSH (OR = 1.64, P = 0.013), after controlling for time-varying confounders. The estimated PAF was 28% from fixed-effects modelling and 51% from conventional modelling.
  
  
  CONCLUSIONS
  Data on Norwegian youths show a statistically significant association between heavy episodic drinking and deliberate self-harm.
authors.affiliation: Norwegian Institute for Alcohol and Drug Research (SIRUS), Oslo, Norway; National Centre for Suicide Research and Prevention, Institute of Clinical Medicine, University of Oslo, Norway.
authors.forename: Ingeborg
authors.initials: I
authors.lastname: Rossow
authors.forename: Thor
authors.initials: T
authors.lastname: Norström
mesh_terms: D000293:Adolescent; D000328:Adult; D063425:Binge Drinking / Q000453:epidemiology* / Q000523:psychology*; D015331:Cohort Studies; D003863:Depression / Q000453:epidemiology / Q000523:psychology; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D015233:Models, Statistical; D009664:Norway; D016017:Odds Ratio; D016487:Parenting / Q000523:psychology; D016728:Self-Injurious Behavior / Q000453:epidemiology* / Q000523:psychology*; D012944:Social Support; D013223:Statistics as Topic; D011795:Surveys and Questionnaires; D055815:Young Adult
keywords: Deliberate self-harm; Norway; fixed effects modelling; heavy episodic drinking; panel data; prospective; young people