title: Obesity, physical activity and traumatic dental injuries in adolescents from East London.
abstract: OBJECTIVE
  Evidence on the interplay between obesity, physical activity and traumatic dental injuries (TDIs) is still inconclusive and heavily based on cross-sectional studies. The aim of this study was to explore the interrelationship of obesity and physical activity at age 11-12 years with TDI at age 15-16-years among schoolchildren from East London.
  
  
  METHODS
  Data were analysed regarding 598 adolescents who participated in phases I and III of the Research with East London Adolescents Community Health Survey (RELACHS), a longitudinal, school-based study of adolescents in East London. Participants reported their level of physical activity and their height and weight were measured to estimate body mass index Z-scores (according to the UK growth reference) when they were 11-12 years old. Oral clinical examinations were conducted to assess TDI, overjet and lip coverage when participants were 15-16 years old. The associations of obesity and physical activity with TDI were evaluated in crude and adjusted models using binary logistic regression.
  
  
  RESULTS
  Overall, 22.6% of adolescents were obese and 7.2% exercised for 7 h or more a week at baseline, while 18.1% of adolescents had experienced TDI by age 15-16 years. Physical activity (7+ hours per week) was significantly associated with TDI (odds ratio: 2.19; 95% confidence interval: 1.08-4.43) in the crude model. However, no significant associations were found between obesity and TDI (1.18; 95% CI: 0.72-1.93) or physical activity and TDI (1.96; 95% CI: 0.94-4.07) in adjusted models.
  
  
  CONCLUSIONS
  This study found no evidence of any associations of obesity and physical activity with TDI among adolescents from East London.
authors.affiliation: King's College London Dental Institute at Guy's, King's College and St Thomas Hospitals, Division of Population and Patient Health, London, UK.
authors.forename: Aswathikutty
authors.initials: A
authors.lastname: Aswathikutty
authors.affiliation: Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.
authors.forename: Wagner
authors.initials: W
authors.lastname: Marcenes
authors.affiliation: Wolfson Institute of Preventive Medicine, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.
authors.forename: Stephen A
authors.initials: SA
authors.lastname: Stansfeld
authors.affiliation: King's College London Dental Institute at Guy's, King's College and St Thomas Hospitals, Division of Population and Patient Health, London, UK.
authors.forename: Eduardo
authors.identifier: http://orcid.org/0000-0002-1858-3713
authors.initials: E
authors.lastname: Bernabé
mesh_terms: D000293:Adolescent; D003430:Cross-Sectional Studies; D015444:Exercise; D005260:Female; D006801:Humans; D008131:London / Q000453:epidemiology; D008137:Longitudinal Studies; D008297:Male; D009765:Obesity / Q000453:epidemiology*; D012307:Risk Factors; D018677:Tooth Injuries / Q000453:epidemiology*
keywords: adolescent; motor activity; obesity; tooth injuries