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Child Obes. 2018 May/Jun;14(4):238-247. doi: 10.1089/chi.2017.0217. Epub 2018 May 29.

Childhood Self-Control and Adolescent Obesity: Evidence from Longitudinal Data on a National Cohort.

Datar A1,2, Chung PJ2,3,4,5.

Author information

1
1 Center for Economic and Social Research, University of Southern California , Los Angeles, CA.
2
2 RAND Health, RAND Corporation , Santa Monica, CA.
3
3 Department of Pediatrics, University of California , Los Angeles, CA.
4
4 Department of Health Policy and Management, University of California , Los Angeles, CA.
5
5 Children's Discovery & Innovation Institute, Mattel Children's Hospital UCLA , Los Angeles, CA.

Abstract

BACKGROUND:

Whether self-control at school entry and changes in self-control in the early school years are predictive of BMI change and obesity onset over the next 8 years using longitudinal data on a nationally representative sample of US children.

METHODS:

Data from the Early Childhood Longitudinal Study-Kindergarten Class 1998 were analyzed. The analysis sample included 7060 children with data from kindergarten (mean age = 6 years) until eighth grade (mean age = 14 years). Self-control was assessed using teacher-reported scales. Child BMI and obese status (BMI ≥95th percentile for age and gender) were computed from height and weight measurements. Weighted linear and logistic regression models were estimated, adjusting for child's cognitive ability and a rich set of child and family covariates.

RESULTS:

High self-control in kindergarten was associated with lesser BMI increase (p < 0.05) and 43% lower odds (adjusted OR [AOR] = 0.57, 95% confidence interval [CI]: 0.38-0.86) of new onset obesity over the subsequent 8 years. The beneficial effect of high self-control in kindergarten emerged between fifth and eighth grade. Among children with low self-control in kindergarten, increase in self-control between kindergarten and fifth grade was associated with a 1.42 kg/m2 (95% CI: -2.82 to -0.02) lesser increase in BMI and 66% lower odds of new obesity onset (AOR = 0.34; 95% CI: 0.14-0.83), between kindergarten and eighth grade.

CONCLUSIONS:

Low self-control at school entry is an important risk factor for unhealthy BMI increase during the transition to adolescence. Increase in self-control in the early school years may prevent unhealthy BMI increase and obesity in adolescence.

KEYWORDS:

BMI; BMI change; childhood obesity; obesity onset; self-control

PMID:
29812975
DOI:
10.1089/chi.2017.0217
[Indexed for MEDLINE]

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