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Accuracy of anthropometry compared t...

Ball, Stephen Daniel.

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Accuracy of anthropometry compared to dual energy x-ray absorptiometry: A new generalizable equation.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Accuracy of anthropometry compared to dual energy x-ray absorptiometry: A new generalizable equation./
Author:	Ball, Stephen Daniel.
Description:	60 p.
Notes:	Adviser: Pam Swan.
Contained By:	Dissertation Abstracts International63-04B.
Subject:	Health Sciences, General. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3045635
ISBN:	0493595767

Accuracy of anthropometry compared to dual energy x-ray absorptiometry: A new generalizable equation.
Ball, Stephen Daniel.

Accuracy of anthropometry compared to dual energy x-ray absorptiometry: A new generalizable equation. - 60 p.

Adviser: Pam Swan.

Thesis (Ph.D.)--Arizona State University, 2002.

Assessing total body fat percent (%BF) accurately is a primary focus of body composition researchers. Anthropometry (i.e., skinfolds and circumferences) is a commonly used field technique, which was developed and validated using hydrostatic weighing, now considered an outdated criterion method. The purpose of this study was to assess the accuracy of three professionally recommended anthropometric equations for women (18 to 55 years old) and then develop an updated prediction equation using Dual Energy X-ray Absorptiometry (DXA), a more accurate criterion measure. Women (N = 150) underwent standard anthropometric measures taken by the same investigator. Percent body fat by anthropometry was compared to DXA on the same day. Results indicated significant correlations (R = 0.896–0.929) (P < 0.01) but significant underestimations (range = 3.2–5.6%) (P < 0.01) of %BF compared to DXA. The following DXA criterion (DC) equation was created from a random validation group (N = 100) and was cross-validated on the remaining 50 subjects: %BF = −9.606 + 0.435(Σ3SF) − 0.001429(Σ3SF)<super>2</super> + 0.153(hip) + 0.07292(age); (Σ3SF = sum of triceps, suprailiac, thigh; hip = circumference in cm; age = years). Cross-validation results of the DC equation showed a high correlation (R = 0.934) with a low standard error (1.7%BF). The mean difference in %BF was only 0.2%BF. The DC equation was further cross-checked on a separate independent sample of women (N = 25) and again showed agreement with a mean difference of 0.2%BF (R = 0.953). These data suggest that the professionally recommended anthropometric equations for women underestimate %BF compared to the new gold standard (DXA) in body composition assessment. The DC equation appears to be a more accurate estimation of %BF in women aged 18 to 55 years old.

ISBN: 0493595767Subjects--Topical Terms:

1017817
Health Sciences, General.

Accuracy of anthropometry compared to dual energy x-ray absorptiometry: A new generalizable equation.
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035 $a (UnM)AAI3045635
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040 $a UnM $c UnM
100 1 $a Ball, Stephen Daniel. $3 1255117
245 1 0 $a Accuracy of anthropometry compared to dual energy x-ray absorptiometry: A new generalizable equation.
300 $a 60 p.
500 $a Adviser: Pam Swan.
500 $a Source: Dissertation Abstracts International, Volume: 63-04, Section: B, page: 1769.
502 $a Thesis (Ph.D.)--Arizona State University, 2002.
520 $a Assessing total body fat percent (%BF) accurately is a primary focus of body composition researchers. Anthropometry (i.e., skinfolds and circumferences) is a commonly used field technique, which was developed and validated using hydrostatic weighing, now considered an outdated criterion method. The purpose of this study was to assess the accuracy of three professionally recommended anthropometric equations for women (18 to 55 years old) and then develop an updated prediction equation using Dual Energy X-ray Absorptiometry (DXA), a more accurate criterion measure. Women (N = 150) underwent standard anthropometric measures taken by the same investigator. Percent body fat by anthropometry was compared to DXA on the same day. Results indicated significant correlations (R = 0.896–0.929) (P < 0.01) but significant underestimations (range = 3.2–5.6%) (P < 0.01) of %BF compared to DXA. The following DXA criterion (DC) equation was created from a random validation group (N = 100) and was cross-validated on the remaining 50 subjects: %BF = −9.606 + 0.435(Σ3SF) − 0.001429(Σ3SF)<super>2</super> + 0.153(hip) + 0.07292(age); (Σ3SF = sum of triceps, suprailiac, thigh; hip = circumference in cm; age = years). Cross-validation results of the DC equation showed a high correlation (R = 0.934) with a low standard error (1.7%BF). The mean difference in %BF was only 0.2%BF. The DC equation was further cross-checked on a separate independent sample of women (N = 25) and again showed agreement with a mean difference of 0.2%BF (R = 0.953). These data suggest that the professionally recommended anthropometric equations for women underestimate %BF compared to the new gold standard (DXA) in body composition assessment. The DC equation appears to be a more accurate estimation of %BF in women aged 18 to 55 years old.
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856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3045635