What is the minimum age for applying the forbes equation between body density and body fat to the elderly?
In order to determine the age above which the FORBES equation for calculating percent body fat (%BF) in the elderly is to be applied, 9 persons in their 60s, 7 persons in their 70s and 3 persons older than 80 took part in this study. %BF was measured using dual-energy X-ray absorptiometry (DEXA). In each subject, body density was measured using densitometry. %BF was then calculated by substituting body density for the Siri or FORBES equation. Based on the value of %BF measured with DEXA, the calculated %BF was criticized for each decade of subjects. It was concluded that the Siri equation should be applied to those who are younger than 80 and that the FORBES equation should be applied to those who are 80 and older.
Miyamoto
S
S
Department of Intercultural Studies, Faculty of Humanities, Miyazaki Municipal University, Japan.
Ishiko
T
T
Shibayama
H
H
D015502:Absorptiometry, Photon; D000367:Age Factors; D000368:Aged / Q000502:physiology*; D000369:Aged, 80 and over; D000886:Anthropometry / Q000379:methods*; D001823:Body Composition / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests