Validation of equations of skinfold thickness for fat mass estimation in hiv/aids subjects: a comparison of dual energy x-ray absorptiometry and computed tomography of abdômen
Rev. bras. ativ. fís. saúde
; 13(2)maio-agos. 2008.
Article
in Portuguese
| LILACS
| ID: lil-536665
Responsible library:
BR12.1
ABSTRACT
The objective of the present study was to develope and to validate equations based on skinfold thickness for the estimation of percent body fat (%BF) in HIV/AIDS subjects using dual energy X-ray absorptiometry (DEXA) and computed tomography of abdomen (CTA) as the gold standards. The sample included 15 adult Brazilian HIV/AIDS subjects (10 men and 5 women). Mean age was 36.9 years (SD 8.2) and mean BF by DEXA was 18.2 (SD 9.5). The estimation of %BF was done using linear regression models, and the independent variables were the sum of one to seven skinfold thickness. The skinfold thickness was compared with DEXA and CTA. The Durnin & Womersley equation was also tested. The best equation for males was [%BF = 3.385 + 0.279 * (axillary + subscapular); r2=0.83] and for females was [%BF = -24.323 + 0.736 * (suprailiac + abdominal + medial calf); r2=0.81]. The total error of the estimate of %BF in HIV/AIDS was <3.5%, the means were not different between males and females from the values measured by DEXA, and the estimated values were highly correlated with DEXA and CTA. The 95% limits of agreement between HIVE and DEXA by the Bland-Altman method were good. The Durnin & Womersley equation was also tested, and the values showed significant differences in the means (males) and the total error was >3.5% for males and females in the comparison with DEXA. The HIV/AIDS equation complied with all the validation criteria. We recommended this equation to be tested in larger samples for estimating %BF among HIV/AIDS subjects.
Full text:
Available
Collection:
International databases
Health context:
SDG3 - Target 3.8 Achieve universal access to health
Health problem:
Delivery Arrangements
Database:
LILACS
Main subject:
Skinfold Thickness
/
Body Composition
/
Tomography
/
Anthropometry
/
HIV
/
Abdominal Fat
Type of study:
Prognostic study
Limits:
Adult
/
Female
/
Humans
/
Male
Language:
Portuguese
Journal:
Rev. bras. ativ. fís. saúde
Journal subject:
Sports Medicine
Year:
2008
Document type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade de São Paulo/BR