Lack of association between television viewing, soft drinks, physical activity and body mass index in children

被引:45
|
作者
Laurson, Kelly [2 ]
Eisenmann, Joey C. [1 ]
Moore, Sylvia [3 ]
机构
[1] Michigan State Univ, Ctr Phys Act & Hlth, Dept Kinesiol, E Lansing, MI 48823 USA
[2] Dept Kinesiol, Ames, IA USA
[3] Univ Wyoming, Dept Med Educ, Laramie, WY 82071 USA
关键词
exercise; nutrition; obesity; overweight; television;
D O I
10.1111/j.1651-2227.2008.00713.x
中图分类号
R72 [儿科学];
学科分类号
100202 ;
摘要
Objective: To examine the cross-sectional and longitudinal associations of physical activity, screen time and dietary habits on the body mass index (BMI) of children. Methods: A cohort of 122 girls and 146 boys (age at entry 10 years) from three rural states in the western USA was studied over an 18-month period. Subjects were measured for height and weight. Habitual physical activity, screen time (television viewing, video games and computer use) and dietary variables were assessed by a questionnaire. Cross-sectional and longitudinal analyses were conducted to examine the associations between physical activity, screen time and diet with BMI at baseline and follow-up and change in BMI. Results: At baseline, approximately 10% of boys and girls were obese and 17.8% of boys and 14.8% of girls were overweight. BMI showed a high degree of stability for boys and girls (r = 0.90), whereas physical activity, screen time and dietary habits showed moderate stability (r = 0.31-0.50) across the 18-month period. Cross-sectional and longitudinal correlations between physical activity, screen time, diet and BMI were low and non-significant (r < 0.15). The regression models explained between 8% and 22% of the variance in the change in BMI; however, none of the predictor variables were statistically significant. Conclusion: Physical activity, screen time and dietary habits were not significantly related to the BMI in cross-sectional or longitudinal analyses. Further research is warranted to better understand the complex, multifactorial phenotype of the BMI in growing and maturing children.
引用
收藏
页码:795 / 800
页数:6
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