Abstract: ObjectiveTo determine the associaton and agreement of anthropometric variables.BIA and DXA indicators of body composition in children and adolescents.MethodsBody composition was measured by anthropometry,bioelectrical impedance analysis(BIA)and dual-energy X-ray absorptiometry(DXA)(criterion method)in 62 children and adolescents aged 8-15.ResultsBody compositon measured by the three methods was positively associated with BMI(r=0.700～0.816).Waist circumstance,hip circumstance and abdominal skinfold thickness were positively associated with trunk fat mass and trunk percent fat mass measured by DXA(r=0.847,0.726,0.885).There exited strong association between SF-based equation and DXA and between BIA and DXA,yet SF-based equation underestimated PBF in most individuals and BIA underestimated PBF under diference fat mass levels.ConclusionThe utility of waist circumstance for the measurement of central fat distribution.PBF measured by SF-based equation and BIA underestimated actual PBF to some extent,and showed poor agreement with DXA.Large samples should be required to confirm fuarther validation.