TY  - JOUR
T1  - Genetic and environmental influences on individual differences in sedentary behavior during adolescence: A twin-family study
AU  - van der Aa N, Bartels M, te Velde SJ, Boomsma DI, de Geus EC, Brug J
Y1  - 2012/06/01
N1  - 10.1001/archpediatrics.2011.1658
JO  - Archives of Pediatrics & Adolescent Medicine
SP  - 509
EP  - 514
VL  - 166
IS  - 6
N2  - Objective 
                  To investigate the degree to which genetic and environmental influences affect individual differences in sedentary behavior throughout adolescence.Design 
                  Cross-sectional twin-family design.Setting 
                  Data on self-reported sedentary behavior from Dutch twins and their nontwin siblings.Participants 
                  The total sample consisted of 5074 adolescent twins (aged 13-19 years) and 937 siblings (aged 12-20 years) from 2777 families.Main Outcome Measures 
                  Screen-viewing sedentary behavior was assessed with survey items about weekly frequency of television viewing, playing electronic games, and computer/Internet use. Based on these items, an overall score for screen-viewing sedentary behavior was computed.Results 
                  The genetic architecture of screen-viewing sedentary behavior differed by age. Variation in sedentary behavior among 12-year-olds was accounted for by genetic (boys: 35%; girls: 19%), shared environmental (boys: 29%; girls: 48%), and nonshared environmental (boys: 36%; girls: 34%) factors. Variation in sedentary behavior among 20-year-olds was accounted for by genetic (boys: 48%; girls: 34%) and nonshared environmental (boys: 52%; girls: 66%) factors.Conclusion 
                  The shift from shared environmental factors in the etiology of sedentary behavior among younger adolescents to genetic and nonshared environmental factors among older adolescents requires age-specific tailoring of intervention programs.
SN  - 1072-4710
M3  - doi: 10.1001/archpediatrics.2011.1658
UR  - http://dx.doi.org/10.1001/archpediatrics.2011.1658
ER  -