Associations between indicators of screen time and adiposity indices in Portuguese children

PREVENTIVE MEDICINE

卷:56

Article

Stamatakis, Emmanuel^1,2  Coombs, Ngaire^1,2  Jago, Russell³  Gama, Augusta^4,9  Mourao, Isabel⁵  Nogueira, Helena^6,9  Rosado, Vitor^7,9  Padez, Cristina^8,9 

[1] UCL, Dept Epidemiol & Publ Hlth, London WC1E 6BT, England

[2] UCL, Div Populat Hlth, PARG, London WC1E 6BT, England

[3] Univ Bristol, Sch Policy Studies, Ctr Exercise Nutr & Hlth Sci, Bristol BS8 1TH, Avon, England

[4] Univ Lisbon, Fac Sci, P-1699 Lisbon, Portugal

[5] Univ Tras Os Montes & Alto Douro, Res Ctr Hlth & Human Dev, Vila Real, Portugal

[6] Univ Coimbra, Dept Geog, P-3000 Coimbra, Portugal

[7] Trop Res Inst, Lisbon, Portugal

[8] Univ Coimbra, Dept Life Sci, P-3000 Coimbra, Portugal

[9] Univ Coimbra, Res Ctr Anthropol & Hlth, P-3000 Coimbra, Portugal

关键词: Epidemiology;    Adiposity;    Sedentary lifestyle;    Child;    Behaviour;    Life style;   

DOI  :  10.1016/j.ypmed.2013.02.006

来源: Elsevier

【 摘 要 】

Objectives. To examine associations between three types of screen time (TV, electronic games (EG), and personal computer (PC)) and two proxies of adiposity (body mass index (BMI) and sum of skinfolds) in children. Design. The sample comprised 17,509 children aged 2-13 years who participated in the 2009/10 Portuguese Prevalence Study of Obesity in Childhood. Methods. Complex samples generalised linear models, using school as a cluster variable were ran separately for each combination of ST predictor and adiposity-related outcome, adjusting for covariates including age, sex, physical activity, diet, and parental factors. Missing values in predictors and covariates were imputed. Results. Watching TV for >2 h/day compared to <1 h/day was associated with higher age- and sex-specific BMI standard deviation score (coefficient: 0.06, 95% CI: 0.01 to 0.12, linear trend p=0.008) and sum of skinfolds (logged and back transformed 0.04, 0.02 to 0.07, p=<0.001). We also found weak evidence for an inverse association between PC and BMI. Conclusions. Associations between ST and adiposity differ by both type of ST and type of adiposity marker. Only TV viewing was consistently associated with adiposity. Studies using a single adiposity marker looking at total screen time or total sedentary behaviour time may miss or confound type-specific associations. (C) 2013 Elsevier Inc. All rights reserved.

【 授权许可】

Free