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

Abstract：

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. :Objetivo: Examinar la validez inter-métodos entre la absorciometría rayos X (DXA) y la pletismografía por desplazamiento de aire (PDA) en ciclistas varones adolescentes, para la evaluación del porcentaje de grasa corporal. Métodos: Se evaluó el porcentaje de grasa corporal de 24 ciclistas varones adolescentes mediante DXA y PDA. La validez inter-métodos se determinó mediante un gráfico de Bland-Altman; se calculó la diferencia intermétodo y los límites de concordancia mediante test t de Student. Se examinó también la heteroscedasticidad ente ambos métodos. Resultados: Los valores de porcentaje de grasa corporal obtenidos por el DXA fueron más elevados que los obtenidos por PDA, y el gráfico presentó heteroscedasticidad (ambos p < 0,05; r = 0,74). Conclusión: El DXA y la PDA no son métodos comparables para la evaluación del porcentaje de grasa en nuestra muestra de ciclistas varones adolescentes; esto debería ser tenido en cuenta a la hora de evaluar cambios longitudinales en esta determinada población.

journal_name

Nutr Hosp

journal_title

Nutricion hospitalaria

authors

González-Agüero A,Olmedillas H,Gómez-Cabello A,Guillén-Ballester A,Casajús JA,Vicente-Rodríguez G

doi

10.3305/nh.2013.28.4.6502

subject

Has Abstract

pub_date

2013-07-01 00:00:00

pages

1049-52

issue

eissn

0212-1611

issn

1699-5198

journal_volume

pub_type

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