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KMID : 0123420080130010013
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Korean Journal of Community Nutrition
2008 Volume.13 No. 1 p.13 ~ p.23
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Weight-related Perceptions, Practices and Eating Behaviors of Middle School Students: Associations with BMI
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Kim Ji-Eun
Min Hye-Sun
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Abstract
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This study investigated the association between the weight status of middle school students and the various weightrelated
characteristics including desired weight, weight perception, weight-related practice, physical activity, and
overeating behavior. Questionnaires were administered to 473 middle school students (178 boys and 295 girls) in
Daejeon. Boys and girls were divided into three groups respectively; (1) underweight (BMI < 5th percentile) (2)
normal weight (5th percentile≤ BMI < 85th percentile) (3) overweight (BMI≥ 85th percentile). Using BMI calculated
from measured height and weight, 14.0% of boys and 6.8% of girls were underweight, and 16.3% of boys and
14.2% of girls were overweight. However, among this sample of students, 38.4% of boys and 13.6% of girls
perceived themselves as underweight and 29.4% of boys and 44.9% of girls perceived themselves as overweight.
We found that overweight students reported their body weights lower and their heights higher compared to nonoverweight
students, resulting in an underestimation of BMI. Based on desired BMI, 79.9% of the girls desired to
be underweight and 73.0% of the boys desired to be normal weight. Overweight or normal weight students were
less satisfied with their body weights than underweight students. Girls had more weight control experience and
concern compared to boys. Overweight girls spent longer times in watching TV compared to non-overweight girls
(p < 0.001) and had more overeating behaviors (p < 0.05). Overweight students reported that they ate snacks less
frequently than non-overweight students, which may be due to their tendency to report less eating. In conclusion,
significant gender differences and weight status differences existed in weight perception, weight satisfaction, and
weight control experience and concern. Because perception of overweight is likely to lead to unhealthy eating
behaviors and weight control, efforts for adolescents to improve accuracy of weight perceptions and to understand
the benefits of being healthier are needed. (Korean J Community Nutrition 13(1) : 13~23, 2008)
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KEYWORD
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middle school students, BMI, weight perception, weight control
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