Inter-methods agreement for the assessment of percentage of body fat between two laboratory methods in male adolescent cyclists

• Main Authors: Alejandro González-Agüero, Hugo Olmedillas, Alba Gómez-Cabello, Alexander Guillén-Ballester, José A. Casajús, Germán Vicente-Rodríguez
• Format: Article
• Language: English
• Published: Arán Ediciones, S. L. 2013-08-01
• Series: Nutrición Hospitalaria
• Subjects: Composición corporal; Grasa corporal; Ciclismo; Adolescentes
• Online Access: http://scielo.isciii.es/scielo.php?script=sci_arttext&pid=S0212-16112013000400010&lng=en&tlng=en

Objective: To examine inter-methods agreement between dual energy X-ray absorptiometry (DXA) and air displacement plethysmography (ADP) in male adolescent cyclists for assessing percentage of body fat (PBF). Methods: PBF of 24 male adolescent cyclists was assessed by DXA and ADP. Agreement between ADP and DXA was determined according to a Bland-Altman plot; validity and lack of agreement was assessed by calculating inter-methods difference. The limits of agreement and differences between methods were also calculated by paired t-tests. Heteroscedasticity was also examined. Results: The values obtained by DXA were higher than those obtained by ADP, and the graph presented heteroscedasticity (both p < 0.05; r = 0.74). Conclusion: DXA and ADP methods were not comparable in terms of PBF assessment in our sample of male adolescent cyclists; it needs to be taken into account when evaluating longitudinal changes in this determined population.