TY - T1 - Leisure activities and obesity in adolescence : a follow-up study among twins SN - / UR - URN:ISBN:978-952-10-4862-3; http://hdl.handle.net/10138/20360 T3 - A1 - Lajunen, Hanna-Reetta A2 - PB - Helsingin yliopisto Y1 - 2010 LA - en AB - The aims of this dissertation were 1) to investigate associations of weight status of adolescents with leisure activities, and computer and cell phone use, and 2) to investigate environmental and genetic influences on body mass index (BMI) during adolescence. Finnish twins born in 1983–1987 responded to postal questionnaires at the ages of 11-12 (5184 participants), 14 (4643 participants), and 17 years (4168 participants). Information was obtained on weight and height, leisure activities inclu... VO - IS - SP - OP - KW - lääketiede, kansanterveystiede N1 - PP - ER -