title: Cross-sectional study showed psychosocial variables, gender and family involvement played an important role in an adolescent weight management programme.
abstract: OBJECTIVE
  This study aimed to investigate the psychosocial gains perceived by overweight adolescents attending a 12-week weight management programme and to analyse gender-specific differences.
  
  
  METHODS
  A quantitative cross-sectional study was conducted with a sample of 70 overweight adolescents aged between 12 and 18 (52.9% girls), evaluated at baseline and at week 12 using anthropometric measurements and self-reported questionnaires. We analysed gender-specific differences related to body self-esteem, social life, relationships with their family, physical comfort, health responsibility, perceived benefits of the intervention, self-efficacy and adherence. We further investigated whether the variables at week 12 would predict changes in their body mass index.
  
  
  RESULTS
  While weight had a greater impact on the body self-esteem of girls, both at baseline and week 12, boys reported higher self-efficacy and adherence as well as a greater perception of the benefits of the intervention at week 12. The body mass index change was positively associated with body self-esteem, relationships within the family and self-efficacy and adherence.
  
  
  CONCLUSIONS
  Gender specifics and the role of psychosocial variables must be taken into account during weight management programmes for adolescents, and it is important to include the family throughout the entire process.
authors.affiliation: Faculdade de Psicologia, Universidade de Lisboa, Lisboa, Portugal.|Escola de Psicologia e Ciências da Vida, COPELABS, Universidade Lusófona, Lisboa, Portugal.
authors.forename: Ana
authors.initials: A
authors.lastname: Prioste
authors.affiliation: Department of Paediatrics, Faculdade de Medicina, Hospital de Santa Maria, Universidade de Lisboa, Lisboa, Portugal.|Rheumatology Research Unit, Faculdade de Medicina, Instituto de Medicina Molecular, Universidade de Lisboa, Lisboa, Portugal.
authors.forename: Helena
authors.initials: H
authors.lastname: Fonseca
authors.affiliation: Instituto Politécnico de Leiria, Leiria, Portugal.
authors.forename: Pedro
authors.initials: P
authors.lastname: Sousa
authors.affiliation: Instituto Politécnico de Leiria, Leiria, Portugal.
authors.forename: Pedro
authors.initials: P
authors.lastname: Gaspar
authors.affiliation: Department of Paediatrics, Faculdade de Medicina, Hospital de Santa Maria, Universidade de Lisboa, Lisboa, Portugal.
authors.forename: Maria do Céu
authors.initials: MD
authors.lastname: Machado
mesh_terms: D000293:Adolescent; D002648:Child; D003430:Cross-Sectional Studies; D005195:Family Relations; D005260:Female; D006801:Humans; D008297:Male; D050177:Overweight / Q000523:psychology / Q000628:therapy*; D010349:Patient Compliance; D011174:Portugal; D012649:Self Concept; D020377:Self Efficacy; D057566:Self Report; D012737:Sex Factors; D012931:Social Environment; D016896:Treatment Outcome; D061217:Weight Reduction Programs
keywords: Adolescence; Body mass index; Gender-specific differences; Overweight; Weight management