Brief reportChild Height and the Risk of Young-Adult Obesity
Introduction
For the prevention and treatment of obesity, clinicians are instructed to categorize children according to BMI percentiles, and then counsel.1, 2, 3 BMI was derived as an index of adiposity that adjusts a subject's weight for his/her height, so there is minimal association between BMI and height. Although this has generally been true in adults, in children several studies4, 5, 6, 7, 8 have noted a positive association between BMI and height.
Previous analysis9 of this study's cohort examined the interrelationships between child height and BMI as continuous variables and found a statistical interaction in the prediction of young adult BMI. In children with a BMI below the 80th percentile, the association of child and adult BMI did not differ among children of different heights. However, among children with a BMI above the 80th percentile, those who were taller had significantly higher young adult BMI compared with those who were shorter.
There is longitudinal tracking of overweight categories from childhood into adulthood.10 The aim of this study is to evaluate whether childhood height influences the probability that normal or overweight children will become overweight young adults.
Section snippets
Study Population
Participants are from the Child and Adolescent Trial for Cardiovascular Health (CATCH), a multicenter, cluster-randomized field trial designed to evaluate the effectiveness of school- and home-based interventions to reduce cardiovascular risk factors. In Fall 1991, 5106 third-graders were assessed. As 12th-graders (Spring 2001), 2909 were reassessed, of which 2802 had complete data, and those data were used for this analysis. Details of the original study11 and this longitudinal cohort are
Results
Child height was positively associated with both child overweight status (r=0.29, p<0.0001) and adult overweight status (r=0.21, p<0.0001). In young adults, overweight status and height were uncorrelated (r=−0.005). Table 1 shows descriptive data.
As seen in Table 2, there was a strong positive association between childhood overweight and adult overweight. Among the 712 children who were overweight or obese in third grade, 566 (79%) remained overweight or obese as young adults. Among the 2090
Discussion
Consistent with previous analysis,9 this investigation found a positive association between child height and young adult overweight status among children who had an elevated BMI. Overweight children who were in the tallest quartile had an 18% higher probability of remaining overweight or obese as young adults compared with overweight children who were in the shortest quartile (85% vs 67%, respectively).
The current study has novel findings in children who had normal BMIs. Among children who were
References (16)
- et al.
Workshop on childhood obesity: summary of the discussion
Am J Clin Nutr
(1999) - et al.
Use of the body mass index (BMI) as a measure of overweight in children and adolescents
J Pediatr
(1998) Expert committee recommendations regarding the prevention, assessment, and treatment of child and adolescent overweight and obesity: summary report
Pediatrics
(2007)- et al.
Inter-relationships among childhood BMI, childhood height, and adult obesity: the Bogalusa Heart Study
Int J Obes Relat Metab Disord
(2004) - et al.
Height and adiposity among children
Obes Res
(2004) - et al.
BMI in childhood and its association with height gain, timing of puberty, and final height
Pediatr Res
(2001) Obesity in childhood: physical growth and development of obese children
Am J Dis Child
(1939)Obesity in childhood: a study of the birth weight, the height, and the onset of puberty
Q J Med
(1955)