Predictive validity of the body adiposity index in costa rican students.
To verify the validity of the body adiposity index (BAI) in a sample of Costa Rican students.



Volunteers were 93 females (mean age = 18.6 ± 2.4 years) and 106 males (mean age = 19.2 ± 2.8 years). Dual-energy X-ray absorptiometry (DXA) was used as the "gold standard" to determine body fat percentage (BF%). Pearson's correlation coefficient and paired samples t-test studied the association and mean differences between BAI and DXA BF%. Concordance between BAI and DXA BF% was determined by the Lin's concordance correlation coefficient and the Bland-Altman agreement analysis.



Significant correlations between BAI and DXA BF% were found for females (r = 0.74) and males (r = 0.53) (P < 0.001). Differences between methods were found for females (BAI = 29.3 ± 4.1% vs. DXA = 36.5 ± 7.9%) and males (BAI = 24.8 ± 3.7% vs. DXA = 21.9 ± 8.6%; P < 0.001). Concordance was poor in females and males. Bland-Altman plots showed BAI underestimating and overestimating BF% in relation to the "gold standard" in females and males, respectively.



BAI presented low agreement with BF% measured by DXA; therefore, BAI is not recommended for BF% prediction in this Central American sample studied. Am. J. Hum. Biol. 28:394-397, 2016. © 2015 Wiley Periodicals, Inc.
School of Physical Education and Sports, University of Costa Rica, San José, Costa Rica.
Elizabeth
E
Carpio-Rivera
School of Physical Education and Sports, University of Costa Rica, San José, Costa Rica.|Human Movement Sciences Research Center (CIMOHU), University of Costa Rica, San José, Costa Rica.
Jessenia
J
Hernández-Elizondo
School of Physical Education and Sports, University of Costa Rica, San José, Costa Rica.|Human Movement Sciences Research Center (CIMOHU), University of Costa Rica, San José, Costa Rica.
Alejandro
A
Salicetti-Fonseca
School of Physical Education and Sports, University of Costa Rica, San José, Costa Rica.|Human Movement Sciences Research Center (CIMOHU), University of Costa Rica, San José, Costa Rica.
Andrea
A
Solera-Herrera
School of Physical Education and Sports, University of Costa Rica, San José, Costa Rica.|Human Movement Sciences Research Center (CIMOHU), University of Costa Rica, San José, Costa Rica.
José
J
Moncada-Jiménez
D015502:Absorptiometry, Photon; D050154:Adiposity; D000293:Adolescent; D000886:Anthropometry / Q000379:methods*; D003364:Costa Rica; D005260:Female; D006801:Humans; D008297:Male; D015203:Reproducibility of Results; D013334:Students / Q000706:statistics & numerical data*; D055815:Young Adult