Do Weight Status and Television-Viewing Influence Children’s Subsequent Dietary Changes? A National Longitudinal Study in the United States.

Auteur(s) :
Wang JY., Chen HJ.
Date :
Fév, 2015
Source(s) :
INTERNATIONAL JOURNAL OF OBESITY. # p
Adresse :
1] Institute of Public Health, National Yang-Ming University, Taiwan, ROC [2] Johns Hopkins Global Center on Childhood Obesity, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.

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OBJECTIVE:
It is unknown how children's dietary changes would vary by overweight/obese status and length of television (TV) viewing. This study examined whether US children's weight status and TV-viewing duration influenced their subsequent dietary behavioral changes.

METHODS:
A national representative sample of the Early Childhood Longitudinal Study-Kindergarten Cohort were followed between 5th and 8th grades during 2004-2007 (N=7720). Children's daily TV-viewing hour and weight status were measured at 5th grade. Children reported their dietary behaviors at the 5th and 8th grades, including fruit/vegetable consumption ⩾5 times per day (five-a-day), daily fast-food and soft drink consumption. Logistic models were used to estimate the odds ratio (OR) of dietary behavioral changes by children's baseline weight status and TV-viewing duration. Gender and race/ethnicity differences in the ORs were examined. Sampling weight and design effect were considered for the analysis.

RESULTS:
Among those without five-a-day at 5th grade, overweight/obese children were more likely to develop the five-a-day behavior at 8th grade than normal-weight children (for overweight: OR=1.65, 95% confidence interval (CI)=1.14-2.39; obese: OR=1.35, 95% CI=0.81-2.23). Among girls, overweight group was more likely to develop eating vegetable ⩾3 times per day than normal-weight group, but 1 more h/day of TV viewing at baseline was associated with lower odds of developing eating vegetable ⩾3 times per day. Overweight/obese black and Hispanic children were significantly more likely to develop five-a-day than their normal-weight counterparts. TV viewing did not show modification effect on the association between weight status and subsequent dietary changes.

CONCLUSIONS:
Overweight/obese children were more likely to improve their subsequent fruit and vegetable consumption than normal-weight children, but TV viewing's independent relationship with dietary changes may counteract the weight status-associated dietary improvement.

Source : Pubmed
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