TY - JOUR
T1 - Predictors and health consequences of screen-time change during adolescence - 1993 Pelotas (Brazil) birth cohort study
AU - Dumith, Samuel Carvalho
AU - Garcia, Leandro Martin Totaro
AU - Da Silva, Kelly Samara
AU - Menezes, Ana Maria Baptista
AU - Hallal, Pedro Curi
N1 - Funding Information:
The cohort study is supported by the Wellcome Trust. The initial phases of the cohort were funded by the European Union and the Brazilian National Program for Centers of Excellence (PRONEX), National Research Council (CNPq), and Ministry of Health. None of these organizations influenced the study design; the collection, analysis, and interpretation of data; the writing of the report; or the decision to submit the manuscript for publication.
PY - 2012/12
Y1 - 2012/12
N2 - Purpose: To investigate screen-time change from early to mid adolescence, its predictors, and its influence on body fat, blood pressure, and leisure-time physical activity. Methods: We used data from a longitudinal prospective study, conducted among participants of the 1993 Pelotas (Brazil) Birth Cohort Study. At baseline, adolescents were, on average, 11 years old. They were later visited at age 15 years. Screen time was self-reported, accounting for the time spent watching television, playing video games, and using the computer. Several predictors were examined. The effect of screen-time change on some health outcomes was also analyzed. Results: Screen time increased on average 60 min/d from 11 to 15 years of age, for the 4,218 adolescents studied. The groups that presented the highest increases in screen time were male, wealthiest, those whose mothers had higher education, and adolescents with a history of school failure. There were positive associations between screen-time change and body mass index, skinfold thickness, waist circumference, and leisure-time physical activity at 15 years of age. Conclusions: Screen time increased from early to mid adolescence. This increment was higher among boys and the wealthiest adolescents. Increases in screen time affected body composition, with negative implications on adiposity.
AB - Purpose: To investigate screen-time change from early to mid adolescence, its predictors, and its influence on body fat, blood pressure, and leisure-time physical activity. Methods: We used data from a longitudinal prospective study, conducted among participants of the 1993 Pelotas (Brazil) Birth Cohort Study. At baseline, adolescents were, on average, 11 years old. They were later visited at age 15 years. Screen time was self-reported, accounting for the time spent watching television, playing video games, and using the computer. Several predictors were examined. The effect of screen-time change on some health outcomes was also analyzed. Results: Screen time increased on average 60 min/d from 11 to 15 years of age, for the 4,218 adolescents studied. The groups that presented the highest increases in screen time were male, wealthiest, those whose mothers had higher education, and adolescents with a history of school failure. There were positive associations between screen-time change and body mass index, skinfold thickness, waist circumference, and leisure-time physical activity at 15 years of age. Conclusions: Screen time increased from early to mid adolescence. This increment was higher among boys and the wealthiest adolescents. Increases in screen time affected body composition, with negative implications on adiposity.
KW - Adiposity
KW - Adolescents
KW - Body composition
KW - Cohort studies
KW - Leisure activities
KW - Sedentary lifestyle
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U2 - 10.1016/j.jadohealth.2012.06.025
DO - 10.1016/j.jadohealth.2012.06.025
M3 - Article
C2 - 23283154
AN - SCOPUS:84869022645
SN - 1054-139X
VL - 51
SP - S16-S21
JO - Journal of Adolescent Health
JF - Journal of Adolescent Health
IS - SUPPL. 6
ER -