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Incidence of childhood overweight and obesity and its association with weight-related attitudes and behaviors in China: a national longitudinal study.


ABSTRACT: BACKGROUND:Childhood obesity is a major public health challenge. We aimed to investigate the incidence of overweight/obesity among Chinese children; and prospectively examine the associations of weight-change intention with risk of overweight/obesity and behavioral changes in initially normal-weight children. METHODS:A national sample of 21,796 children aged 6-17 years were investigated in September 2013 and followed up nine months later, of which 19,887 (91%) were normal weight and 1909 (9%) were underweight at baseline. Weight and height were objectively measured. Weight perception, weight-change intention, weight control practices, weight-related behaviors, and demographic information were obtained by questionnaires. RESULTS:Among children with underweight or normal-weight, the cumulative incidence of overweight/obesity was 2.77% (95% CI 2.55-2.99). Among normal-weight children, those who overestimated their weight had higher baseline BMI z-scores and an increased relative risk (RR) of overweight/obesity (RR 1.51, 95% CI 1.15-1.99). Children who misperceived themselves as underweight or overweight had stronger weight-change intention than their counterparts. However, children with weight-change intention did not develop greater changes in dietary intakes, physical activities, or sedentary behaviors than those without intention. There was no significant association between weight-change intention and incidence after adjusting for BMI z-scores at baseline. Self-reported improving diet, increasing physical activity, and dieting were associated with certain actual behavioral improvements and smaller increase in BMI z-score, but not associated with decreased risk of overweight/obesity. CONCLUSION:The 9-months cumulative incidence of overweight/obesity was 2.77% among Chinese children. Weight-change intention was not associated with incidence of overweight/obesity in normal-weight children, regardless of their weight perception. More importantly, children's weight-change intention was insufficient in achieving desirable behavioral changes. Future overweight and obesity prevention programs should directly target on promoting children's actual behavioral changes.

SUBMITTER: Cai L 

PROVIDER: S-EPMC6215687 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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Incidence of childhood overweight and obesity and its association with weight-related attitudes and behaviors in China: a national longitudinal study.

Cai Li L   Dai Meixia M   Lin Lizi L   Yang Wenhan W   Chen Yajun Y   Ma Jun J   Jing Jin J  

The international journal of behavioral nutrition and physical activity 20181103 1


<h4>Background</h4>Childhood obesity is a major public health challenge. We aimed to investigate the incidence of overweight/obesity among Chinese children; and prospectively examine the associations of weight-change intention with risk of overweight/obesity and behavioral changes in initially normal-weight children.<h4>Methods</h4>A national sample of 21,796 children aged 6-17 years were investigated in September 2013 and followed up nine months later, of which 19,887 (91%) were normal weight a  ...[more]

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