The purpose of this study was to compare the accuracy of eight
anthropometric regression equations with hydrostatic weighing for
predicting the percent body fat of adult males with Down Syndrome
(DS). Body fat percentages were predicted for 18 adult males with DS.
Skinfold, circumference, and bioelectric impedance analysis data were
collected to determine how accurately the regression equations could
predict the percent fat of these individuals when compared to
hydrostatic weighing. Since hydrostatic weighing involves a number of
complex procedures two pilot studies were conducted.
Four subjects participated in the pilot studies. The first pilot
was conducted to determine if a constant value of residual volume
could be utilized during hydrostatic weighing, or if a measured value,
determined by oxygen dilution, needed to be used. The second pilot
was performed to determine if hydrostatic weighing at total lung
capacity without head submersion could be substituted for the
conventional method of hydrostatic weighing.
Paired t-tests revealed no significant differences in either pilot
study, t (3) = .274, p. < .05 and t (3) = .314, 11 < .05, respectively.
Pearson product-moment correlations revealed r values of .99 for both
pilot studies. Based on these results a constant residual volume value
of 1.50 L and hydrostatic weighing at total lung capacity without head
submersion were the procedures utilized in the main research study.
A one-way repeated measures analysis of variance revealed a
significant difference between the body fat data obtained from
hydrostatic weighing and the regression equations, F (8, 136) = 16.05,
< .05. Dunnett's post-hoc procedure revealed significant differences
in five of the eight equations. Of the three equations that did not yield
significantly different results, only the Kelly and Rimmer (1987), r =
.89, SEE = 2.51, 12 <.05, can be recommended for use.
Based on these results, it appears that a constant value of 1.50 L
for residual volume and hydrostatic weighing at total lung capacity
without head submersion can be utilized when predicting the percent
body fat of adult males with DS. This will allow increased numbers of
individuals with DS to be hydrostatically weighed. Also, the use of the
Kelly and Rimmer (1987) equation will allow researchers and
practitioners to utilize an easy, fast, accurate, and inexpensive method
of predicting the percent body fat of adult males with DS. / Graduation date: 1992
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/36658 |
| Date | 28 October 1991 |
| Creators | Ovalle, Steven E. (Steven Edward) |
| Contributors | Dunn, John M. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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