title: Social and school connectedness in early secondary school as predictors of late teenage substance use, mental health, and academic outcomes.
abstract: OBJECTIVE
  To examine associations between social relationships and school engagement in early secondary school and mental health, substance use, and educational achievement 2-4 years later.
  
  
  METHODS
  School-based longitudinal study of secondary school students, surveyed at school in Year 8 (13-14-years-old) and Year 10 (16-years-old), and 1-year post-secondary school. A total of 2678 Year 8 students (74%) participated in the first wave of data collection. For the school-based surveys, attrition was <10%. Seventy-one percent of the participating Year 8 students completed the post-secondary school survey.
  
  
  RESULTS
  Having both good school and social connectedness in Year 8 was associated with the best outcomes in later years. In contrast, participants with low school connectedness but good social connectedness were at elevated risk of anxiety/depressive symptoms (odds ratio [OR]: 1.3; 95% confidence interval [CI]: 1.0, 1.76), regular smoking (OR: 2.0; 95% CI: 1.4, 2.9), drinking (OR: 1.7; 95% CI: 1.3, 2.2), and using marijuana (OR: 2.0; 95% CI: 1.6, 2.5) in later years. The likelihood of completing school was reduced for those with either poor social connectedness, low school connectedness, or both.
  
  
  CONCLUSIONS
  Overall, young people's experiences of early secondary school and their relationships with others may continue to affect their moods, their substance use in later years, and their likelihood of completing secondary school. Having both good school connectedness and good social connectedness is associated with the best outcomes. The challenge is how to promote both school and social connectedness to best achieve these health and learning outcomes.
authors: Centre for Adolescent Health, Royal Children's Hospital, Department of Paediatrics, University of Melbourne and Murdoch Children's Research Institute, Melbourne, Australia. lyndal.bond@rch.org.au <lyndal.bond@rch.org.au>
authors: Lyndal
authors: L
authors: Bond
authors: Helen
authors: H
authors: Butler
authors: Lyndal
authors: L
authors: Thomas
authors: John
authors: J
authors: Carlin
authors: Sara
authors: S
authors: Glover
authors: Glenn
authors: G
authors: Bowes
authors: George
authors: G
authors: Patton
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology*; D000428:Alcohol Drinking / Q000453:epidemiology; D015984:Causality; D015331:Cohort Studies; D015897:Comorbidity; D003863:Depression / Q000453:epidemiology; D004521:Educational Measurement; D004522:Educational Status; D005191:Family Characteristics; D005260:Female; D005544:Forecasting; D006801:Humans; D007398:Interpersonal Relations; D008137:Longitudinal Studies; D008297:Male; D008603:Mental Health / Q000706:statistics & numerical data*; D011159:Population Surveillance; D012574:Schools; D012907:Smoking / Q000453:epidemiology; D012918:Social Alienation / Q000523:psychology; D012925:Social Conformity; D013315:Stress, Psychological / Q000453:epidemiology; D019966:Substance-Related Disorders / Q000453:epidemiology / Q000517:prevention & control*; D014739:Victoria / Q000453:epidemiology