title: Longitudinal testing of a dietary self-care motivational model in adolescents with diabetes.
abstract: OBJECTIVE
  Based on self-determination theory, this study tests a model positing that perceived autonomy support from parents and health care providers positively predicts self-efficacy and autonomous self-regulation in dietary self-care. In turn, self-efficacy and autonomous self-regulation predict better dietary self-care over time.
  
  
  METHODS
  Longitudinal data were collected in a consecutive series of 289 adolescent patients with type I diabetes at two time points separated by a two-year interval.
  
  
  RESULTS
  Structural equation modeling analysis revealed that perceived autonomy support from health care providers at Time 1 (T1) positively predicted self-efficacy and autonomous self-regulation at Time 2 (T2), T1 self-efficacy and autonomous self-regulation positively predicted T2 dietary self-care, and T1 dietary self-care positively predicted T2 autonomous self-regulation.
  
  
  CONCLUSIONS
  Autonomy support from health care providers appears to help adolescents develop motivational factors for dietary self-care and adhere to dietary recommendations.
authors.affiliation: School of Psychology, Université Laval, Québec, Canada. stephanie.austin@uqtr.ca
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Austin
authors.forename: Frédéric
authors.initials: F
authors.lastname: Guay
authors.forename: Caroline
authors.initials: C
authors.lastname: Senécal
authors.forename: Claude
authors.initials: C
authors.lastname: Fernet
authors.forename: Arie
authors.initials: A
authors.lastname: Nouwen
mesh_terms: D000293:Adolescent; D003922:Diabetes Mellitus, Type 1 / Q000523:psychology*; D004032:Diet / Q000523:psychology*; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008960:Models, Psychological; D009042:Motivation; D010290:Parents; D026684:Personal Autonomy; D012648:Self Care; D020377:Self Efficacy
keywords: Autonomous self-regulation; Autonomy support; Dietary self-care; Self-efficacy; diabetes