Original scientific paper
Birth Order and BMI in Teenage Girls
S. Koziel
H. Kolodziej
Abstract
The goal of this study was to investigate the relation of birth order to relative weight
and prevalence of obesity in a group of 13–15 years old girls. In 1997, 1458 girls were examined.
The height and weight measured by trained staff were recorded. Family size
and birth order were obtained by a questionnaire. For the purpose of the present study,
776 and 250 girls coming from two- and three-child full families, respectively, were selected
from the total sample on the basis of complete information. The Body Mass Index
(kg/m2) was adjusted to reference US population (NCHS) by means of the LMS parameters.
Prevalence of overweight and obesity was defined according to recommendation of
the International Obesity Task Force. The effect of birth order on BMI was tested by
one-way analysis of variance. Prevalence of obesity was tested by the means of Pearson
chi-square. First and second born girls from two-sibling families did not show significant
differences in average standardized BMI. Relative weight significantly differs
among girls coming from three sibling families, decreasing along with the birth order.
The first-born girls were 1.5 times at higher risk of obesity in comparison to later- born
girls. Differences in the proportion of overweight girls among birth order groups showed
a high significance within three sibling families.
Keywords
Hrčak ID:
28444
URI
Publication date:
17.12.2001.
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