Comparison of Growth from First to Sixth Grade Based on the Obesity Index of Sixth Grade Students at an Elementary School in Seoul

Hyun-Kyung Moon; Mi-Ock Yoon; Min-Joung Jang

doi:10.4163/kjn.2011.44.3.212

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Moon, Yoon, and Jang: Comparison of Growth from First to Sixth Grade Based on the Obesity Index of Sixth Grade Students at an Elementary School in Seoul

Research Article

Korean Journal of Nutrition

Korean Journal of Nutrition 2011; 44(3): 212-221.

Published online: 30 June 2011

DOI: https://doi.org/10.4163/kjn.2011.44.3.212

Comparison of Growth from First to Sixth Grade Based on the Obesity Index of Sixth Grade Students at an Elementary School in Seoul

Hyun-Kyung Moon, Mi-Ock Yoon, Min-Joung Jang

Department of Food Science & Nutrition, Dankook University, Yongin 448-701, Korea.

To whom correspondence should be addressed. (moonhk52@dankook.ac.kr)

Received 8 July 2010 Revised 16 August 2010 Accepted 23 May 2011

Abstract

This study was conducted to identify differences in growth based on the obesity index in sixth grade. Heights and weights of 141 students from first to sixth grades were collected from school records. Other information was gathered by survey, and the weight length index (WLI) was calculated. Subjects were classified into three groups: underweight (n = 57, UG), normal (n = 53, NG), and obese (n = 31, OG) using the WLI. Differences in weight, height, and growth velocity were compared among the three groups from the first to sixth grades. With regard to growth, the past physical status of the three groups was maintained. More than 50% of the OG was in the overweight range when they were in the third to fifth grades. Approximately 60% of NG was in the normal weight range between the first and fifth grades. More than 70% of UG was in the underweight range when they were in the first to fifth grades (p < 0.001). Growth velocity was faster in OG than that in NG and UG (p < 0.001). The annual growth rate of children was the highest when they moved from the third to the fourth grade (p < 0.001). The results indicate that general balanced diet education should be implemented in lower grades, because physical growth formed in lower grades tended to be maintained in senior grades. It would be better to educate students about diet to prevent obesity before the fifth grade when a major change in body structure has occurred.

Keywords: height, weight, WLI, obesity, growth velocity

Figures and Tables

Fig. 1

Distribution of weight for under weight subjects at 6^th grade from 1^st to 5^th grade.

Fig. 2

Distribution of weight for normal weight subjects at 6^th grade from 1^st to 5^th grade.

Fig. 3

Distribution of weight for over weight subjects at 6^th grade from 1^st to 5^th grade.

Table 1

Mean and standard deviation of height, weight and WLI for study subjects by grade

1) Mean ± SD 2) ^*: p < 0.05, ^**: p < 0.01, ^***: p < 0.001 3) WLI, Weight Length Index

Table 2

Mean and standard deviation of height, weight and WLI at 6th grade by the current obesity status

1) Mean ± SD 2) ^***: p < 0.001 3) WLI, Weight Length Index 4) a, b, c: Values with different subscrit with a obesity status are significantly different at p < 0.05

Table 3

Distribution of obesity index at 6^th grade by sex [N (%)]

ns: not significant (p > 0.05)

Table 4

Mean and standard deviation of height, weight and WLI by grade and the current obesity status

1) Mean ± SD 2) ^***: p < 0.001 3) WLI, Weight Length Index 4) a, b, c : Values with different subscrit with a obesity status are significantly different at p < 0.05

Table 5

Mean and standard deviation of height change and weight change, WLI change by the current obesity status

1) Mean ± SD 2) ^*: p < 0.05, ^***: p < 0.001 3) WLI, Weight Length Index 4) a, b, c: Values with different subscrit with a obesity status are significantly different at p < 0.05

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